Signaling for inter-base station interference estimation

ABSTRACT

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a message indicating one or more communication patterns from a base station. The one or more communication patterns may indicate to the UE to adjust one or more parameters for transmitting an uplink communication during a set of time resources, a set of beams, a set of ports, or any combination thereof. During the resources indicated in the one or more communication patterns, the base station may estimate a cross-link interference channel between the base station and a second base station. The one or more communication patterns may indicate a hopping pattern for each subband of a bandwidth part. The base station may configure the UE with a timing advance based on the message.

FIELD OF TECHNOLOGY

The following relates to wireless communication, including signaling forinter-base station interference estimation.

BACKGROUND

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonalfrequency division multiplexing (DFT-S-OFDM). A wireless multiple-accesscommunications system may include one or more base stations or one ormore network access nodes, each simultaneously supporting communicationfor multiple communication devices, which may be otherwise known as userequipment (UE).

SUMMARY

The described techniques relate to improved methods, systems, devices,and apparatuses that support signaling for inter-base stationinterference estimation. Generally, the described techniques provide formeasuring interference for full duplex communications. For example, thetechniques enable a base station to estimate a cross-link interference(CLI) channel between a first base station and a second base station.Estimating the CLI channel may enable the first base station to mitigateinterference between uplink channels and the CLI channel. For example, auser equipment (UE) may receive a message indicating one or morecommunication patterns from the first base station. In some cases, theone or more communication patterns may indicate to the UE to adjust aparameter (e.g., wait, use a reduced transmit power, mute, timingadvance (TA)) for transmitting an uplink communication during a set oftime resources, a set of beams, a set of ports, or any combinationthereof. During the resources indicated in the one or more communicationpatterns, the first base station may estimate the CLI channel betweenthe first base station and the second base station. The first basestation may then use the estimated CLI channel to improve the receptionof uplink communications during full duplex scenarios. In some cases,the one or more communication patterns may indicate a hopping pattern.The hopping pattern may indicate each subband of a bandwidth part (BWP)that the base station may use to estimate the CLI channel for at leastone time resource. In some cases, the base station may configure the UEwith a TA based on the message. In some examples, the base station mayuse one or more types of resources (e.g., a downlink resource or aflexible resource converted to a downlink resource) for measuring CLI.

A method for wireless communication at a UE is described. The method mayinclude receiving, from a first base station, a message that indicatesone or more communication patterns of one or more resources forestimating a CLI channel between uplink communications associated withthe first base station and downlink communications associated with asecond base station, adjusting a transmission parameter for an uplinkcommunication based on receiving the message from the first basestation, and transmitting the uplink communication over the one or moreresources based on adjusting the transmission parameter.

An apparatus for wireless communication at a UE is described. Theapparatus may include a processor, memory coupled with the processor,and instructions stored in the memory. The instructions may beexecutable by the processor to cause the apparatus to receive, from afirst base station, a message that indicates one or more communicationpatterns of one or more resources for estimating a CLI channel betweenuplink communications associated with the first base station anddownlink communications associated with a second base station, adjust atransmission parameter for an uplink communication based on receivingthe message from the first base station, and transmit the uplinkcommunication over the one or more resources based on adjusting thetransmission parameter.

Another apparatus for wireless communication at a UE is described. Theapparatus may include means for receiving, from a first base station, amessage that indicates one or more communication patterns of one or moreresources for estimating a CLI channel between uplink communicationsassociated with the first base station and downlink communicationsassociated with a second base station, means for adjusting atransmission parameter for an uplink communication based on receivingthe message from the first base station, and means for transmitting theuplink communication over the one or more resources based on adjustingthe transmission parameter.

A non-transitory computer-readable medium storing code for wirelesscommunication at a UE is described. The code may include instructionsexecutable by a processor to receive, from a first base station, amessage that indicates one or more communication patterns of one or moreresources for estimating a CLI channel between uplink communicationsassociated with the first base station and downlink communicationsassociated with a second base station, adjust a transmission parameterfor an uplink communication based on receiving the message from thefirst base station, and transmit the uplink communication over the oneor more resources based on adjusting the transmission parameter.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, from thefirst base station, a second message to activate a communication patternof the one or more communication patterns, where adjusting atransmission parameter for the uplink communication may be based onreceiving the second message.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the message includes a radioresource control message and the second message includes a medium accesscontrol-control element or downlink control information.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, adjusting the transmissionparameter for the uplink communication may include operations, features,means, or instructions for reducing the transmit power of the uplinkcommunications during at least a portion of the one or more resources.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, reducing the transmit powerof the uplink communications may include operations, features, means, orinstructions for reducing the transmit power of the uplinkcommunications to zero during the portion of the one or more resources.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying a firstsubband of a BWP for estimating the CLI channel, a second subband of theBWP for a second uplink communication by the UE, and a third subband ofthe BWP as a guard band between the first subband and the second subbandbased on receiving the message, the one or more resources including theBWP, where the one or more communication patterns included in themessage indicate the first subband, the second subband, and the thirdsubband, where adjusting a transmission parameter for the uplinkcommunication may be based on the identifying.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, over thesecond subband, the uplink communication to the first base station basedon transmitting the message.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying a hoppingpattern of subbands of a BWP for estimating the CLI channel andtransmitting the uplink communications based on receiving the message,the hopping pattern spanning a set of multiple slots, where the one ormore communication patterns indicate the hopping pattern, whereadjusting a transmission parameter for the uplink communication may bebased on the identifying.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the hopping pattern indicatesat least one time resource for each subband of the subbands of the BWPfor estimating the CLI channel.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, adjusting the transmissionparameter for the uplink communication may include operations, features,means, or instructions for applying a TA for the uplink communicationtransmitted by the UE during a first time resource of the one or moreresources based on receiving the message, the TA based on a propagationdelay of a downlink communication transmitted by the second basestation.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the TA may be based on acapability of the UE.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, adjusting the transmissionparameter for the uplink communication may include operations, features,means, or instructions for identifying one or more beams to restrict theUE from using to transmit the uplink communication during the one ormore resources, where the message indicates the one or more beams.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, from thefirst base station, a second message that schedules the UE with theuplink communication using the one or more beams and determining to skipthe uplink communication or use a different beam than the one or morebeams based on the one or more communication patterns.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying one or moresubbands of frequency resources or one or more slots of time resourcesor both for estimating the CLI channel, where the message includes anindication of the one or more subbands or the one or more slots.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the one or more resourcesinclude one or more subbands of frequency resources and one or moreslots of time resources.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the one or more communicationpatterns indicate to the UE to mute or reduce a transmit power of one ormore uplink communications during a set of time resources of the one ormore resources.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the one or more communicationpatterns indicate a set of beams that the UE may be restricted fromusing for the uplink communications.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the one or more communicationpatterns indicate one or more ports for estimating the CLI channel.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first base station may beconfigured to receive the uplink communications over the one or moreresources and the second base station may be configured to transmit thedownlink communications over the one or more resources.

A method for wireless communication at a first base station isdescribed. The method may include transmitting, to a UE, a message thatindicates one or more communication patterns of one or more resourcesfor estimating a CLI channel between the first base station and a secondbase station, the first base station configured to receive uplinkcommunications over the one or more resources, monitoring the one ormore resources for CLI associated with the second base station based ontransmitting the message, and processing a first uplink communicationfrom the UE communicated over a resource full duplexed with one or moredownlink communications associated with the second base station based onmonitoring the one or more resources for the CLI.

An apparatus for wireless communication at a first base station isdescribed. The apparatus may include a processor, memory coupled withthe processor, and instructions stored in the memory. The instructionsmay be executable by the processor to cause the apparatus to transmit,to a UE, a message that indicates one or more communication patterns ofone or more resources for estimating a CLI channel between the firstbase station and a second base station, the first base stationconfigured to receive uplink communications over the one or moreresources, monitor the one or more resources for CLI associated with thesecond base station based on transmitting the message, and process afirst uplink communication from the UE communicated over a resource fullduplexed with one or more downlink communications associated with thesecond base station based on monitoring the one or more resources forthe CLI.

Another apparatus for wireless communication at a first base station isdescribed. The apparatus may include means for transmitting, to a UE, amessage that indicates one or more communication patterns of one or moreresources for estimating a CLI channel between the first base stationand a second base station, the first base station configured to receiveuplink communications over the one or more resources, means formonitoring the one or more resources for CLI associated with the secondbase station based on transmitting the message, and means for processinga first uplink communication from the UE communicated over a resourcefull duplexed with one or more downlink communications associated withthe second base station based on monitoring the one or more resourcesfor the CLI.

A non-transitory computer-readable medium storing code for wirelesscommunication at a first base station is described. The code may includeinstructions executable by a processor to transmit, to a UE, a messagethat indicates one or more communication patterns of one or moreresources for estimating a CLI channel between the first base stationand a second base station, the first base station configured to receiveuplink communications over the one or more resources, monitor the one ormore resources for CLI associated with the second base station based ontransmitting the message, and process a first uplink communication fromthe UE communicated over a resource full duplexed with one or moredownlink communications associated with the second base station based onmonitoring the one or more resources for the CLI.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting a secondmessage to activate a communication pattern of the one or morecommunication patterns, where monitoring the one or more resources forthe CLI may be based on transmitting the second message.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the message includes a radioresource control message and the second message includes a medium accesscontrol-control element or downlink control information.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying one or moreUEs to mute the uplink communications during at least a portion of theone or more resources, the one or more UEs including the first UE, wheretransmitting the message may be based on identifying the one or moreUEs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying one or moreUEs to reduce a transmit power of the uplink communications during atleast a portion of the one or more resources, the one or more UEsincluding the first UE, where transmitting the message may be based onidentifying the one or more UEs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying one or moresubbands of frequency resources or one or more slots of time resourcesor both for estimating the CLI channel, where the message includes anindication of the one or more subbands or the one or more slots.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the one or more resourcesinclude one or more subbands of frequency resources and one or moreslots of time resources.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the one or more communicationpatterns indicate to the UE to mute or reduce a transmit power of one ormore uplink communications during a set of time resources of the one ormore resources.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying a firstsubband of a BWP for estimating the CLI channel, a second subband of theBWP for an uplink communication by the UE, and a third subband of theBWP as a guard band between the first subband and the second subband,the one or more resources including the BWP, where the one or morecommunication patterns included in the message indicate the firstsubband, the second subband, and the third subband.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for monitoring the one ormore resources further includes monitoring the first subband of the BWPfor the CLI.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving, over thesecond subband, the uplink communication from the UE based ontransmitting the message.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying a hoppingpattern of subbands of a BWP for estimating the CLI channel andreceiving the uplink communications, the hopping pattern spanning a setof multiple slots, where the one or more communication patterns indicatethe hopping pattern.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the hopping pattern indicatesat least one time resource for each subband of the subbands of the BWPfor estimating the CLI channel.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying a TA for anuplink communication communicated by the UE during the one or moreresources, the TA based on a propagation delay of a downlinkcommunication transmitted by the second base station and transmitting,to the UE, a second message that includes the TA, where the monitoringmay be based on transmitting the second message.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the TA may be based on acapability of the UE.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying one or morebeams to restrict the UE from using to transmit the uplinkcommunications during the one or more resources, where the messageindicates the one or more beams.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the one or more communicationpatterns indicate to the UE a set of beams that the UE may be restrictedfrom using for the uplink communications.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying a firstquantity of reference signals transmitted by the second base station andidentifying a second quantity of ports for estimating the CLI channelbased on identifying the first quantity of reference signals, where theone or more communication patterns may be based on identifying thesecond quantity of ports.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the second base station maybe configured to transmit downlink communications over the one or moreresources.

A method for wireless communication at a first base station isdescribed. The method may include transmitting a message indicating afirst resource including a first type of resource or a second resourceincluding a second type of resource to use for estimating a CLI channelbetween the first base station and a second base station, where thefirst base station is configured to receive uplink communications ortransmit downlink communications to a UE over the first type of resourceand the first base station is configured to transmit the downlinkcommunications to the UE over the second type of resource, monitoringone or more resources for CLI associated with the second base stationbased on transmitting the message, and processing a first uplinkcommunication from the UE over a full-duplex resource based onmonitoring the one or more resources for the CLI.

An apparatus for wireless communication at a first base station isdescribed. The apparatus may include a processor, memory coupled withthe processor, and instructions stored in the memory. The instructionsmay be executable by the processor to cause the apparatus to transmit amessage indicating a first resource including a first type of resourceor a second resource including a second type of resource to use forestimating a CLI channel between the first base station and a secondbase station, where the first base station is configured to receiveuplink communications or transmit downlink communications to a UE overthe first type of resource and the first base station is configured totransmit the downlink communications to the UE over the second type ofresource, monitor one or more resources for CLI associated with thesecond base station based on transmitting the message, and process afirst uplink communication from the UE over a full-duplex resource basedon monitoring the one or more resources for the CLI.

Another apparatus for wireless communication at a first base station isdescribed. The apparatus may include means for transmitting a messageindicating a first resource including a first type of resource or asecond resource including a second type of resource to use forestimating a CLI channel between the first base station and a secondbase station, where the first base station is configured to receiveuplink communications or transmit downlink communications to a UE overthe first type of resource and the first base station is configured totransmit the downlink communications to the UE over the second type ofresource, means for monitoring one or more resources for CLI associatedwith the second base station based on transmitting the message, andmeans for processing a first uplink communication from the UE over afull-duplex resource based on monitoring the one or more resources forthe CLI.

A non-transitory computer-readable medium storing code for wirelesscommunication at a first base station is described. The code may includeinstructions executable by a processor to transmit a message indicatinga first resource including a first type of resource or a second resourceincluding a second type of resource to use for estimating a CLI channelbetween the first base station and a second base station, where thefirst base station is configured to receive uplink communications ortransmit downlink communications to a UE over the first type of resourceand the first base station is configured to transmit the downlinkcommunications to the UE over the second type of resource, monitor oneor more resources for CLI associated with the second base station basedon transmitting the message, and process a first uplink communicationfrom the UE over a full-duplex resource based on monitoring the one ormore resources for the CLI.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting, to theUE, a second message to convert the first type of resource to the secondtype of resource, where monitoring the one or more resources for the CLImay be based on transmitting the message.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the second message includes aslot format indicator configured to convert the first resource includingthe first type of resource to be the second type of resource.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first type of resourceincludes a flexible symbol configured to use with the uplinkcommunications or the downlink communications and the second type ofresource includes a downlink symbol.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1 and 2 illustrate examples of a wireless communications systemthat supports signaling for inter-base station interference estimationin accordance with aspects of the present disclosure.

FIG. 3 illustrates an example of a process flow that supports signalingfor inter-base station interference estimation in accordance withaspects of the present disclosure.

FIGS. 4A and 4B illustrate examples of configurations that supportsignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure.

FIG. 5 illustrates an example of a wireless communications systemtimeline that supports signaling for inter-base station interferenceestimation in accordance with aspects of the present disclosure.

FIGS. 6 and 7 show block diagrams of devices that support signaling forinter-base station interference estimation in accordance with aspects ofthe present disclosure.

FIG. 8 shows a block diagram of a communications manager that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure.

FIG. 9 shows a diagram of a system including a device that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure.

FIGS. 10 and 11 show block diagrams of devices that support signalingfor inter-base station interference estimation in accordance withaspects of the present disclosure.

FIG. 12 shows a block diagram of a communications manager that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure.

FIG. 13 shows a diagram of a system including a device that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure.

FIGS. 14 through 18 show flowcharts illustrating methods that supportsignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure.

DETAILED DESCRIPTION

A base station may support estimating a cross-link interference (CLI)channel to perform operations to mitigate CLI. In some cases, a firstbase station may receive uplink communication from a first userequipment (UE) over a first set of communication resources. A secondbase station may transmit downlink communication to a second UE over thesame set of communication resources (e.g., using the same time resourcesand frequency resources). Due to a direction of transmission and asignal strength of the downlink communication, the downlinkcommunication from the second base station may interfere with the uplinktransmission from the first UE in a full duplex scenario. In such cases,because of the interference, the first base station may not be able tosuccessfully decode the uplink communication. This interference may bean example of a CLI channel between the first base station and thesecond base station. For the first base station to perform CLImitigating procedures, the first base station may estimate the CLIchannel (e.g., interference from the second base station on thechannel). As the CLI mitigating procedure depends on the CLI estimate,obtaining an accurate CLI estimate is desirable. However, the first basestation may receive uplink communications on the channel during aprocess to estimate the CLI channel, which may degrade the quality(accuracy) of the CLI estimate. While the description of CLI wasdiscussed with reference to a second base station, a first UE, and asecond UE, a CLI channel may occur during any signaling interferencethat a base station may use to receive uplink communications (e.g., fromone or more UEs).

The techniques described herein provide procedures for estimatinginterference for full duplex communications between different nodes in acommunication network. The techniques enable a first base station toestimate a CLI channel between the first base station and a second basestation that uses the same resources that are used for uplinkcommunications. For example, a UE may receive a message indicating oneor more communication patterns from the first base station. In somecases, the one or more communication patterns may indicate to the UE toadjust a parameter (e.g., wait, use a reduced transmit power, mute,timing advance [TA]) for transmitting an uplink communication during aset of time resources, a set of beams, a set of ports, or anycombination thereof. During the resources indicated in the one or morecommunication patterns, the first base station may estimate the CLIchannel between the first base station and the second base station. Thefirst base station may then use the estimated CLI channel to improve thereception of uplink communications during full duplex scenarios. In somecases, the one or more communication patterns may indicate a hoppingpattern. The hopping pattern may indicate each subband of a BWP that thebase station may use to measure CLI for at least one time resource. Insome cases, the base station may configure the UE with a TA based on themessage. In some examples, the base station may use one or more types ofresources (e.g., a downlink resource or a flexible resource converted toa downlink resource) for measuring CLI.

Aspects of the disclosure are initially described in the context ofwireless communications systems. Aspects are then described with respectto a process flow, resource configurations, and a wirelesscommunications system timeline. Aspects of the disclosure are furtherillustrated by and described with reference to apparatus diagrams,system diagrams, and flowcharts that relate to signaling for inter-basestation interference estimation.

FIG. 1 illustrates an example of a wireless communications system 100that supports signaling for inter-base station interference estimationin accordance with aspects of the present disclosure. The wirelesscommunications system 100 may include one or more base stations 105, oneor more UEs 115, and a core network 130. In some examples, the wirelesscommunications system 100 may be a Long Term Evolution (LTE) network, anLTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR)network. In some examples, the wireless communications system 100 maysupport enhanced broadband communications, ultra-reliablecommunications, low latency communications, communications with low-costand low-complexity devices, or any combination thereof.

The base stations 105 may be dispersed throughout a geographic area toform the wireless communications system 100 and may be devices indifferent forms or having different capabilities. The base stations 105and the UEs 115 may wirelessly communicate via one or more communicationlinks 125. Each base station 105 may provide a coverage area 110 overwhich the UEs 115 and the base station 105 may establish one or morecommunication links 125. The coverage area 110 may be an example of ageographic area over which a base station 105 and a UE 115 may supportthe communication of signals according to one or more radio accesstechnologies.

The UEs 115 may be dispersed throughout a coverage area 110 of thewireless communications system 100, and each UE 115 may be stationary,or mobile, or both at different times. The UEs 115 may be devices indifferent forms or having different capabilities. Some example UEs 115are illustrated in FIG. 1 . The UEs 115 described herein may be able tocommunicate with various types of devices, such as other UEs 115, thebase stations 105, or network equipment (e.g., core network nodes, relaydevices, integrated access and backhaul (IAB) nodes, or other networkequipment), as shown in FIG. 1 .

In some examples, one or more components of the wireless communicationssystem 100 may operate as or be referred to as a network node. As usedherein, a network node may refer to any UE 115, base station 105, entityof a core network 130, apparatus, device, or computing system configuredto perform any techniques described herein. For example, a network nodemay be a UE 115. As another example, a network node may be a basestation 105. As another example, a first network node may be configuredto communicate with a second network node or a third network node. Inone aspect of this example, the first network node may be a UE 115, thesecond network node may be a base station 105, and the third networknode may be a UE 115. In another aspect of this example, the firstnetwork node may be a UE 115, the second network node may be a basestation 105, and the third network node may be a base station 105. Inyet other aspects of this example, the first, second, and third networknodes may be different. Similarly, reference to a UE 115, a base station105, an apparatus, a device, or a computing system may includedisclosure of the UE 115, base station 105, apparatus, device, orcomputing system being a network node. For example, disclosure that a UE115 is configured to receive information from a base station 105 alsodiscloses that a first network node is configured to receive informationfrom a second network node. In this example, consistent with thisdisclosure, the first network node may refer to a first UE 115, a firstbase station 105, a first apparatus, a first device, or a firstcomputing system configured to receive the information; and the secondnetwork node may refer to a second UE 115, a second base station 105, asecond apparatus, a second device, or a second computing system

The base stations 105 may communicate with the core network 130, or withone another, or both. For example, the base stations 105 may interfacewith the core network 130 through one or more backhaul links 120 (e.g.,via an S1, N2, N3, or other interface). The base stations 105 maycommunicate with one another over the backhaul links 120 (e.g., via anX2, Xn, or other interface) either directly (e.g., directly between basestations 105), or indirectly (e.g., via core network 130), or both. Insome examples, the backhaul links 120 may be or include one or morewireless links.

One or more of the base stations 105 described herein may include or maybe referred to by a person having ordinary skill in the art as a basetransceiver station, a radio base station, an access point, a radiotransceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or agiga-NodeB (either of which may be referred to as a gNB), a Home NodeB,a Home eNodeB, or other suitable terminology.

A UE 115 may include or may be referred to as a mobile device, awireless device, a remote device, a handheld device, or a subscriberdevice, or some other suitable terminology, where the “device” may alsobe referred to as a unit, a station, a terminal, or a client, amongother examples. A UE 115 may also include or may be referred to as apersonal electronic device such as a cellular phone, a personal digitalassistant (PDA), a tablet computer, a laptop computer, or a personalcomputer. In some examples, a UE 115 may include or be referred to as awireless local loop (WLL) station, an Internet of Things (IoT) device,an Internet of Everything (IoE) device, or a machine type communications(MTC) device, among other examples, which may be implemented in variousobjects such as appliances, or vehicles, meters, among other examples.

The UEs 115 described herein may be able to communicate with varioustypes of devices, such as other UEs 115 that may sometimes act as relaysas well as the base stations 105 and the network equipment includingmacro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations,among other examples, as shown in FIG. 1 .

The UEs 115 and the base stations 105 may wirelessly communicate withone another via one or more communication links 125 over one or morecarriers. The term “carrier” may refer to a set of radio frequencyspectrum resources having a defined physical layer structure forsupporting the communication links 125. For example, a carrier used fora communication link 125 may include a portion of a radio frequencyspectrum band (e.g., a bandwidth part (BWP)) that is operated accordingto one or more physical layer channels for a given radio accesstechnology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layerchannel may carry acquisition signaling (e.g., synchronization signals,system information), control signaling that coordinates operation forthe carrier, user data, or other signaling. The wireless communicationssystem 100 may support communication with a UE 115 using carrieraggregation or multi-carrier operation. A UE 115 may be configured withmultiple downlink component carriers and one or more uplink componentcarriers according to a carrier aggregation configuration. Carrieraggregation may be used with both frequency division duplexing (FDD) andtime division duplexing (TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration), acarrier may also have acquisition signaling or control signaling thatcoordinates operations for other carriers. A carrier may be associatedwith a frequency channel (e.g., an evolved universal mobiletelecommunication system terrestrial radio access (E-UTRA) absoluteradio frequency channel number (EARFCN)) and may be positioned accordingto a channel raster for discovery by the UEs 115. A carrier may beoperated in a standalone mode where initial acquisition and connectionmay be conducted by the UEs 115 via the carrier, or the carrier may beoperated in a non-standalone mode where a connection is anchored using adifferent carrier (e.g., of the same or a different radio accesstechnology).

The communication links 125 shown in the wireless communications system100 may include uplink transmissions from a UE 115 to a base station105, or downlink transmissions from a base station 105 to a UE 115.Carriers may carry downlink or uplink communications (e.g., in an FDDmode) or may be configured to carry downlink and uplink communications(e.g., in a TDD mode).

A carrier may be associated with a particular bandwidth of the radiofrequency spectrum, and in some examples the carrier bandwidth may bereferred to as a “system bandwidth” of the carrier or the wirelesscommunications system 100. For example, the carrier bandwidth may be oneof a number of determined bandwidths for carriers of a particular radioaccess technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz(MHz)). Devices of the wireless communications system 100 (e.g., thebase stations 105, the UEs 115, or both) may have hardwareconfigurations that support communications over a particular carrierbandwidth or may be configurable to support communications over one of aset of carrier bandwidths. In some examples, the wireless communicationssystem 100 may include base stations 105 or UEs 115 that supportsimultaneous communications via carriers associated with multiplecarrier bandwidths. In some examples, each served UE 115 may beconfigured for operating over portions (e.g., a sub-band, a BWP) or allof a carrier bandwidth.

Signal waveforms transmitted over a carrier may be made up of multiplesubcarriers (e.g., using multi-carrier modulation (MCM) techniques suchas orthogonal frequency division multiplexing (OFDM) or discrete Fouriertransform spread OFDM (DFT-S-OFDM)). In a system employing MCMtechniques, a resource element may consist of one symbol period (e.g., aduration of one modulation symbol) and one subcarrier, where the symbolperiod and subcarrier spacing are inversely related. The number of bitscarried by each resource element may depend on the modulation scheme(e.g., the order of the modulation scheme, the coding rate of themodulation scheme, or both). Thus, the more resource elements that a UE115 receives and the higher the order of the modulation scheme, thehigher the data rate may be for the UE 115. A wireless communicationsresource may refer to a combination of a radio frequency spectrumresource, a time resource, and a spatial resource (e.g., spatial layersor beams), and the use of multiple spatial layers may further increasethe data rate or data integrity for communications with a UE 115.

One or more numerologies for a carrier may be supported, where anumerology may include a subcarrier spacing (Δf) and a cyclic prefix. Acarrier may be divided into one or more BWPs having the same ordifferent numerologies. In some examples, a UE 115 may be configuredwith multiple BWPs. In some examples, a single BWP for a carrier may beactive at a given time and communications for the UE 115 may berestricted to one or more active BWPs.

The time intervals for the base stations 105 or the UEs 115 may beexpressed in multiples of a basic time unit which may, for example,refer to a sampling period of T_(s)=1/(Δf_(max)·N_(f)) seconds, whereΔf_(max) may represent the maximum supported subcarrier spacing, andN_(f) may represent the maximum supported discrete Fourier transform(DFT) size. Time intervals of a communications resource may be organizedaccording to radio frames each having a specified duration (e.g., 10milliseconds (ms)). Each radio frame may be identified by a system framenumber (SFN) (e.g., ranging from 0 to 1023).

Each frame may include multiple consecutively numbered subframes orslots, and each subframe or slot may have the same duration. In someexamples, a frame may be divided (e.g., in the time domain) intosubframes, and each subframe may be further divided into a number ofslots. Alternatively, each frame may include a variable number of slots,and the number of slots may depend on subcarrier spacing. Each slot mayinclude a number of symbol periods (e.g., depending on the length of thecyclic prefix prepended to each symbol period). In some wirelesscommunications systems 100, a slot may further be divided into multiplemini-slots containing one or more symbols. Excluding the cyclic prefix,each symbol period may contain one or more (e.g., N_(f)) samplingperiods. The duration of a symbol period may depend on the subcarrierspacing or frequency band of operation.

A subframe, a slot, a mini-slot, or a symbol may be the smallestscheduling unit (e.g., in the time domain) of the wirelesscommunications system 100 and may be referred to as a transmission timeinterval (TTI). In some examples, the TTI duration (e.g., the number ofsymbol periods in a TTI) may be variable. Additionally, oralternatively, the smallest scheduling unit of the wirelesscommunications system 100 may be dynamically selected (e.g., in burstsof shortened TTIs (sTTIs)).

Physical channels may be multiplexed on a carrier according to varioustechniques. A physical control channel and a physical data channel maybe multiplexed on a downlink carrier, for example, using one or more oftime division multiplexing (TDM) techniques, frequency divisionmultiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A controlregion (e.g., a control resource set (CORESET)) for a physical controlchannel may be defined by a number of symbol periods and may extendacross the system bandwidth or a subset of the system bandwidth of thecarrier. One or more control regions (e.g., CORESETs) may be configuredfor a set of the UEs 115. For example, one or more of the UEs 115 maymonitor or search control regions for control information according toone or more search space sets, and each search space set may include oneor multiple control channel candidates in one or more aggregation levelsarranged in a cascaded manner. An aggregation level for a controlchannel candidate may refer to a number of control channel resources(e.g., control channel elements (CCEs)) associated with encodedinformation for a control information format having a given payloadsize. Search space sets may include common search space sets configuredfor sending control information to multiple UEs 115 and UE-specificsearch space sets for sending control information to a specific UE 115.

Each base station 105 may provide communication coverage via one or morecells, for example a macro cell, a small cell, a hot spot, or othertypes of cells, or any combination thereof. The term “cell” may refer toa logical communication entity used for communication with a basestation 105 (e.g., over a carrier) and may be associated with anidentifier for distinguishing neighboring cells (e.g., a physical cellidentifier (PCID), a virtual cell identifier (VCID), or others). In someexamples, a cell may also refer to a geographic coverage area 110 or aportion of a geographic coverage area 110 (e.g., a sector) over whichthe logical communication entity operates. Such cells may range fromsmaller areas (e.g., a structure, a subset of structure) to larger areasdepending on various factors such as the capabilities of the basestation 105. For example, a cell may be or include a building, a subsetof a building, or exterior spaces between or overlapping with geographiccoverage areas 110, among other examples.

A macro cell generally covers a relatively large geographic area (e.g.,several kilometers in radius) and may allow unrestricted access by theUEs 115 with service subscriptions with the network provider supportingthe macro cell. A small cell may be associated with a lower-powered basestation 105, as compared with a macro cell, and a small cell may operatein the same or different (e.g., licensed, unlicensed) frequency bands asmacro cells. Small cells may provide unrestricted access to the UEs 115with service subscriptions with the network provider or may providerestricted access to the UEs 115 having an association with the smallcell (e.g., the UEs 115 in a closed subscriber group (CSG), the UEs 115associated with users in a home or office). A base station 105 maysupport one or multiple cells and may also support communications overthe one or more cells using one or multiple component carriers.

In some examples, a carrier may support multiple cells, and differentcells may be configured according to different protocol types (e.g.,MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that mayprovide access for different types of devices.

In some examples, a base station 105 may be movable and thereforeprovide communication coverage for a moving geographic coverage area110. In some examples, different geographic coverage areas 110associated with different technologies may overlap, but the differentgeographic coverage areas 110 may be supported by the same base station105. In other examples, the overlapping geographic coverage areas 110associated with different technologies may be supported by differentbase stations 105. The wireless communications system 100 may include,for example, a heterogeneous network in which different types of thebase stations 105 provide coverage for various geographic coverage areas110 using the same or different radio access technologies.

The wireless communications system 100 may support synchronous orasynchronous operation. For synchronous operation, the base stations 105may have similar frame timings, and transmissions from different basestations 105 may be approximately aligned in time. For asynchronousoperation, the base stations 105 may have different frame timings, andtransmissions from different base stations 105 may, in some examples,not be aligned in time. The techniques described herein may be used foreither synchronous or asynchronous operations.

Some UEs 115, such as MTC or IoT devices, may be low cost or lowcomplexity devices and may provide for automated communication betweenmachines (e.g., via Machine-to-Machine (M2M) communication). M2Mcommunication or MTC may refer to data communication technologies thatallow devices to communicate with one another or a base station 105without human intervention. In some examples, M2M communication or MTCmay include communications from devices that integrate sensors or metersto measure or capture information and relay such information to acentral server or application program that makes use of the informationor presents the information to humans interacting with the applicationprogram. Some UEs 115 may be designed to collect information or enableautomated behavior of machines or other devices. Examples ofapplications for MTC devices include smart metering, inventorymonitoring, water level monitoring, equipment monitoring, healthcaremonitoring, wildlife monitoring, weather and geological eventmonitoring, fleet management and tracking, remote security sensing,physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ operating modes that reducepower consumption, such as half-duplex communications (e.g., a mode thatsupports one-way communication via transmission or reception, but nottransmission and reception simultaneously). In some examples,half-duplex communications may be performed at a reduced peak rate.Other power conservation techniques for the UEs 115 include entering apower saving deep sleep mode when not engaging in active communications,operating over a limited bandwidth (e.g., according to narrowbandcommunications), or a combination of these techniques. For example, someUEs 115 may be configured for operation using a narrowband protocol typethat is associated with a defined portion or range (e.g., set ofsubcarriers or resource blocks (RBs)) within a carrier, within aguard-band of a carrier, or outside of a carrier.

The wireless communications system 100 may be configured to supportultra-reliable communications or low-latency communications, or variouscombinations thereof. For example, the wireless communications system100 may be configured to support ultra-reliable low-latencycommunications (URLLC). The UEs 115 may be designed to supportultra-reliable, low-latency, or critical functions. Ultra-reliablecommunications may include private communication or group communicationand may be supported by one or more services such as push-to-talk,video, or data. Support for ultra-reliable, low-latency functions mayinclude prioritization of services, and such services may be used forpublic safety or general commercial applications. The termsultra-reliable, low-latency, and ultra-reliable low-latency may be usedinterchangeably herein.

In some examples, a UE 115 may also be able to communicate directly withother UEs 115 over a device-to-device (D2D) communication link 135(e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115utilizing D2D communications may be within the geographic coverage area110 of a base station 105. Other UEs 115 in such a group may be outsidethe geographic coverage area 110 of a base station 105 or be otherwiseunable to receive transmissions from a base station 105. In someexamples, groups of the UEs 115 communicating via D2D communications mayutilize a one-to-many (1:M) system in which each UE 115 transmits toevery other UE 115 in the group. In some examples, a base station 105facilitates the scheduling of resources for D2D communications. In othercases, D2D communications are carried out between the UEs 115 withoutthe involvement of a base station 105.

In some systems, the D2D communication link 135 may be an example of acommunication channel, such as a sidelink communication channel, betweenvehicles (e.g., UEs 115). In some examples, vehicles may communicateusing vehicle-to-everything (V2X) communications, vehicle-to-vehicle(V2V) communications, or some combination of these. A vehicle may signalinformation related to traffic conditions, signal scheduling, weather,safety, emergencies, or any other information relevant to a V2X system.In some examples, vehicles in a V2X system may communicate with roadsideinfrastructure, such as roadside units, or with the network via one ormore network nodes (e.g., base stations 105) using vehicle-to-network(V2N) communications, or with both.

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. The core network 130 may be anevolved packet core (EPC) or 5G core (5GC), which may include at leastone control plane entity that manages access and mobility (e.g., amobility management entity (MME), an access and mobility managementfunction (AMF)) and at least one user plane entity that routes packetsor interconnects to external networks (e.g., a serving gateway (S-GW), aPacket Data Network (PDN) gateway (P-GW), or a user plane function(UPF)). The control plane entity may manage non-access stratum (NAS)functions such as mobility, authentication, and bearer management forthe UEs 115 served by the base stations 105 associated with the corenetwork 130. User IP packets may be transferred through the user planeentity, which may provide IP address allocation as well as otherfunctions. The user plane entity may be connected to IP services 150 forone or more network operators. The IP services 150 may include access tothe Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or aPacket-Switched Streaming Service.

Some of the network devices, such as a base station 105, may includesubcomponents such as an access network entity 140, which may be anexample of an access node controller (ANC). Each access network entity140 may communicate with the UEs 115 through one or more other accessnetwork transmission entities 145, which may be referred to as radioheads, smart radio heads, or transmission/reception points (TRPs). Eachaccess network transmission entity 145 may include one or more antennapanels. In some configurations, various functions of each access networkentity 140 or base station 105 may be distributed across various networkdevices (e.g., radio heads and ANCs) or consolidated into a singlenetwork device (e.g., a base station 105).

The wireless communications system 100 may operate using one or morefrequency bands, typically in the range of 300 megahertz (MHz) to 300gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known asthe ultra-high frequency (UHF) region or decimeter band because thewavelengths range from approximately one decimeter to one meter inlength. The UHF waves may be blocked or redirected by buildings andenvironmental features, but the waves may penetrate structuressufficiently for a macro cell to provide service to the UEs 115 locatedindoors. The transmission of UHF waves may be associated with smallerantennas and shorter ranges (e.g., less than 100 kilometers) compared totransmission using the smaller frequencies and longer waves of the highfrequency (HF) or very high frequency (VHF) portion of the spectrumbelow 300 MHz.

The wireless communications system 100 may also operate in a super highfrequency (SHF) region using frequency bands from 3 GHz to 30 GHz, alsoknown as the centimeter band, or in an extremely high frequency (EHF)region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as themillimeter band. In some examples, the wireless communications system100 may support millimeter wave (mmW) communications between the UEs 115and the base stations 105, and EHF antennas of the respective devicesmay be smaller and more closely spaced than UHF antennas. In someexamples, this may facilitate use of antenna arrays within a device. Thepropagation of EHF transmissions, however, may be subject to evengreater atmospheric attenuation and shorter range than SHF or UHFtransmissions. The techniques disclosed herein may be employed acrosstransmissions that use one or more different frequency regions, anddesignated use of bands across these frequency regions may differ bycountry or regulating body.

The wireless communications system 100 may utilize both licensed andunlicensed radio frequency spectrum bands. For example, the wirelesscommunications system 100 may employ License Assisted Access (LAA),LTE-Unlicensed (LTE-U) radio access technology, or NR technology in anunlicensed band such as the 5 GHz industrial, scientific, and medical(ISM) band. When operating in unlicensed radio frequency spectrum bands,devices such as the base stations 105 and the UEs 115 may employ carriersensing for collision detection and avoidance. In some examples,operations in unlicensed bands may be based on a carrier aggregationconfiguration in conjunction with component carriers operating in alicensed band (e.g., LAA). Operations in unlicensed spectrum may includedownlink transmissions, uplink transmissions, P2P transmissions, or D2Dtransmissions, among other examples.

A base station 105 or a UE 115 may be equipped with multiple antennas,which may be used to employ techniques such as transmit diversity,receive diversity, multiple-input multiple-output (MIMO) communications,or beamforming. The antennas of a base station 105 or a UE 115 may belocated within one or more antenna arrays or antenna panels, which maysupport MIMO operations or transmit or receive beamforming. For example,one or more base station antennas or antenna arrays may be co-located atan antenna assembly, such as an antenna tower. In some examples,antennas or antenna arrays associated with a base station 105 may belocated in diverse geographic locations. A base station 105 may have anantenna array with a number of rows and columns of antenna ports thatthe base station 105 may use to support beamforming of communicationswith a UE 115. Likewise, a UE 115 may have one or more antenna arraysthat may support various MIMO or beamforming operations. Additionally,or alternatively, an antenna panel may support radio frequencybeamforming for a signal transmitted via an antenna port.

The base stations 105 or the UEs 115 may use MIMO communications toexploit multipath signal propagation and increase the spectralefficiency by transmitting or receiving multiple signals via differentspatial layers. Such techniques may be referred to as spatialmultiplexing. The multiple signals may, for example, be transmitted bythe transmitting device via different antennas or different combinationsof antennas. Likewise, the multiple signals may be received by thereceiving device via different antennas or different combinations ofantennas. Each of the multiple signals may be referred to as a separatespatial stream and may carry bits associated with the same data stream(e.g., the same codeword) or different data streams (e.g., differentcodewords). Different spatial layers may be associated with differentantenna ports used for channel measurement and reporting. MIMOtechniques include single-user MIMO (SU-MIMO), where multiple spatiallayers are transmitted to the same receiving device, and multiple-userMIMO (MU-MIMO), where multiple spatial layers are transmitted tomultiple devices.

Beamforming, which may also be referred to as spatial filtering,directional transmission, or directional reception, is a signalprocessing technique that may be used at a transmitting device or areceiving device (e.g., a base station 105, a UE 115) to shape or steeran antenna beam (e.g., a transmit beam, a receive beam) along a spatialpath between the transmitting device and the receiving device.Beamforming may be achieved by combining the signals communicated viaantenna elements of an antenna array such that some signals propagatingat particular orientations with respect to an antenna array experienceconstructive interference while others experience destructiveinterference. The adjustment of signals communicated via the antennaelements may include a transmitting device or a receiving deviceapplying amplitude offsets, phase offsets, or both to signals carriedvia the antenna elements associated with the device. The adjustmentsassociated with each of the antenna elements may be defined by abeamforming weight set associated with a particular orientation (e.g.,with respect to the antenna array of the transmitting device orreceiving device, or with respect to some other orientation).

A base station 105 or a UE 115 may use beam sweeping techniques as partof beam forming operations. For example, a base station 105 may usemultiple antennas or antenna arrays (e.g., antenna panels) to conductbeamforming operations for directional communications with a UE 115.Some signals (e.g., synchronization signals, reference signals, beamselection signals, or other control signals) may be transmitted by abase station 105 multiple times in different directions. For example,the base station 105 may transmit a signal according to differentbeamforming weight sets associated with different directions oftransmission. Transmissions in different beam directions may be used toidentify (e.g., by a transmitting device, such as a base station 105, orby a receiving device, such as a UE 115) a beam direction for latertransmission or reception by the base station 105.

Some signals, such as data signals associated with a particularreceiving device, may be transmitted by a base station 105 in a singlebeam direction (e.g., a direction associated with the receiving device,such as a UE 115). In some examples, the beam direction associated withtransmissions along a single beam direction may be determined based on asignal that was transmitted in one or more beam directions. For example,a UE 115 may receive one or more of the signals transmitted by the basestation 105 in different directions and may report to the base station105 an indication of the signal that the UE 115 received with a highestsignal quality or an otherwise acceptable signal quality.

In some examples, transmissions by a device (e.g., by a base station 105or a UE 115) may be performed using multiple beam directions, and thedevice may use a combination of digital precoding or radio frequencybeamforming to generate a combined beam for transmission (e.g., from abase station 105 to a UE 115). The UE 115 may report feedback thatindicates precoding weights for one or more beam directions, and thefeedback may correspond to a configured number of beams across a systembandwidth or one or more sub-bands. The base station 105 may transmit areference signal (e.g., a cell-specific reference signal (CRS), achannel state information reference signal (CSI-RS)), which may beprecoded or unprecoded. The UE 115 may provide feedback for beamselection, which may be a precoding matrix indicator (PMI) orcodebook-based feedback (e.g., a multi-panel type codebook, a linearcombination type codebook, a port selection type codebook). Althoughthese techniques are described with reference to signals transmitted inone or more directions by a base station 105, a UE 115 may employsimilar techniques for transmitting signals multiple times in differentdirections (e.g., for identifying a beam direction for subsequenttransmission or reception by the UE 115) or for transmitting a signal ina single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., a UE 115) may try multiple receiveconfigurations (e.g., directional listening) when receiving varioussignals from the base station 105, such as synchronization signals,reference signals, beam selection signals, or other control signals. Forexample, a receiving device may try multiple receive directions byreceiving via different antenna subarrays, by processing receivedsignals according to different antenna subarrays, by receiving accordingto different receive beamforming weight sets (e.g., differentdirectional listening weight sets) applied to signals received atmultiple antenna elements of an antenna array, or by processing receivedsignals according to different receive beamforming weight sets appliedto signals received at multiple antenna elements of an antenna array,any of which may be referred to as “listening” according to differentreceive configurations or receive directions. In some examples, areceiving device may use a single receive configuration to receive alonga single beam direction (e.g., when receiving a data signal). The singlereceive configuration may be aligned in a beam direction determinedbased on listening according to different receive configurationdirections (e.g., a beam direction determined to have a highest signalstrength, highest signal-to-noise ratio (SNR), or otherwise acceptablesignal quality based on listening according to multiple beamdirections).

The wireless communications system 100 may be a packet-based networkthat operates according to a layered protocol stack. In the user plane,communications at the bearer or Packet Data Convergence Protocol (PDCP)layer may be IP-based. A Radio Link Control (RLC) layer may performpacket segmentation and reassembly to communicate over logical channels.A Medium Access Control (MAC) layer may perform priority handling andmultiplexing of logical channels into transport channels. The MAC layermay also use error detection techniques, error correction techniques, orboth to support retransmissions at the MAC layer to improve linkefficiency. In the control plane, the Radio Resource Control (RRC)protocol layer may provide establishment, configuration, and maintenanceof an RRC connection between a UE 115 and a base station 105 or a corenetwork 130 supporting radio bearers for user plane data. At thephysical layer, transport channels may be mapped to physical channels.

The UEs 115 and the base stations 105 may support retransmissions ofdata to increase the likelihood that data is received successfully.Hybrid automatic repeat request (HARQ) feedback is one technique forincreasing the likelihood that data is received correctly over acommunication link 125. HARQ may include a combination of errordetection (e.g., using a cyclic redundancy check (CRC)), forward errorcorrection (FEC), and retransmission (e.g., automatic repeat request(ARQ)). HARQ may improve throughput at the MAC layer in poor radioconditions (e.g., low signal-to-noise conditions). In some examples, adevice may support same-slot HARQ feedback, where the device may provideHARQ feedback in a specific slot for data received in a previous symbolin the slot. In other cases, the device may provide HARQ feedback in asubsequent slot, or according to some other time interval.

In some examples, the wireless communications system 100 may support atype of full duplex communication for different base stations. Fullduplex communication may include a communication device transmitting andreceiving on a same time resource, a same frequency resource, or anycombination thereof. If the communication device transmits and receiveson the same time resource and the same frequency resource, the fullduplex communication may be considered as in-band full duplex (IBFD). InIBFD, the downlink and uplink communications may share a same IBFD timeand frequency resource such that the downlink and uplink communicationsare either partially or fully overlapped across the resources. If thecommunication device transmits and receives on the same time resourcebut on different frequency resources the full duplex communication maybe considered as a sub-band flexible duplex (FDD) or sub-band fullduplex (SBFD). In sub-band FDD the downlink resource may be separatedfrom the uplink resource in the frequency domain by a guard band (GB).

In some cases, signal interference may come from inter-base station orinter-UE communication in various forms of full duplex operation. Forexample, a first base station may be able to configure a set of timeresources for uplink or downlink communications and a second basestation may be able to configure the same set of time resources foruplink or downlink communications, independently of the first basestation. In situations where the first base station configures the setof resources for uplink communications and the second base stationconfigures the set of resources for downlink communications, the firstbase station may experience CLI during the set of resources. In anotherexample, a first base station 105 and a second base station 105 may bein full duplex operation and a first UE 115 and a second UE 115 may bein half duplex operation. The first base station 105 may transmit adownlink communication to the first UE 115 while receiving uplinkcommunication from the second UE 115, causing self-interference. Duringa same resource, the second base station may transmit a downlinkcommunication to either the first UE 115 or the second UE 115 and causeinter-base station interference. In one example, the first base station105, the second base station 105, the first UE 115, and the second UE115 may be in full duplex operation. The first UE 115 may transmit andreceive wireless communication, causing self-interference. During thesame resource, the second UE 115 may receive a downlink communicationfrom the second base station 105 and cause inter-UE interference. In oneexample, the first base station 105 and the second base station 105 maybe in half duplex operation and the first UE 115 may be in full duplexoperation. The first UE 115 may transmit an uplink communication to thefirst base station 105 and receive a downlink communication from thesecond base station 105 during a same resource, causingself-interference. The various forms on interference may be examples ofCLI.

In some examples, CLI management (e.g., similar to dynamic TDDscenarios) may be desirable. There may be one or more CLI mitigatingprocedures that may apply, or be effective, in different scenarios. Forexample, for intra operator interference (e.g., co-channel), duringinter-base station interference, the one or more CLI mitigatingprocedures may include spatial separation, BWP partitioning forfrequency division multiplexing (FDM), and interference cancellation(e.g., beamforming nulling and optional digital interferencecancellation). During inter-UE interference, the one or more CLImitigating procedures may include CLI aided scheduling. For interoperator interference (e.g., adjacent channel), during inter-basestation interference, the one or more CLI mitigating procedures mayinclude max uplink and downlink BWP separation and spatial separation ofco-located antennas. During inter-UE interference, the one or more CLImitigating procedures may include max uplink and downlink BWPseparation.

In some examples of inter-base station CLI mitigation, a first basestation 105 and a second base station 105 may coordinate. For example,in co-channel interference (e.g., dynamic TDD), a coverage area 110(e.g., a neighboring cell or sector) may coordinate to reduceinterference by restricting one or more beams, power back-off, dynamiczoning, slot conversion, or any combination thereof. In some cases, thefirst base station 105 and the second base station 105 may coordinatefor receive beamforming (nulling) or interference cancellation that mayrequire an inter-base station channel to project into null space.

In some cases, to perform the various CLI mitigating procedures ortechniques, a victim base station 105 may estimate a CLI channel (e.g.,from an aggressor base station 105). In some cases, a process thatincorporates measuring for CLI may include performing receiver ortransmitter nulling (e.g., beamforming nulling and digital interferencecancellation) based on knowing the channel (e.g., per-tone), estimatingdominant direction (beam) from the aggressor base station 105 in thechannel, and finding a combiner configuration based on inter-basestation CLI. In some cases, the CLI estimate may include an inter-basestation channel and aggressor base station samples for the interferencecancelation. As the CLI mitigating procedures depend on the CLImeasurement or estimate, obtaining an accurate CLI estimate isdesirable. However, the victim base station 105 may receive uplinkcommunications on the channel during the CLI measurement or estimation,which may degrade the quality (accuracy) of the CLI measurement orestimation. To increase the accuracy of the CLI measurement or estimateat the victim base station 105, the victim base station 105 may send, toone or more connected UEs 115, a communication pattern to request theone or more connected UEs 115 to adjust a transmission parameter foruplink communications during at least a portion of time for measuring orestimating CLI. In some examples, the communication pattern may be anuplink muting indication. The uplink muting indication may prevent theone or more connected UEs 115 from transmitting uplink communicationswithin resources used for CLI measurement or estimation, as the uplinkcommunications may interfere with the CLI channel measurement. In somecases, simultaneous CLI channel measurement and reception of uplinkcommunications may be possible in SBFD slots, provided enough isolationin frequency to mitigate the impact of timing misalignment.

In some examples, in an SBFD scenario, the timing misalignment for CLIchannel measurement may cause an inaccurate CLI measurement. Forexample, the time that the victim base station 105 receives the uplinkcommunication and the time that the victim base station 105 measures theCLI channel for interference from the aggressor base station 105 (e.g.,a downlink communication from the aggressor base station 105) may bedifferent. Because the one or more connected UEs 115 have differentpropagation delays than the aggressor base station 105 a cyclic prefix(CP) of the uplink communication and a second CP of the downlinkcommunication may not overlap in time. Thus, an orthogonality betweenthe communications may be misaligned and the quality of an estimation ofCLI on the channel may be reduced. In some examples, the differentpropagation delays may be due to each UE 115 having a different TA whilethe aggressor base station 105 has no TA and each device being locatedat a different distance from the victim base station 105, among otherexamples.

In some cases, an uplink cancellation indication (ULCI) may indicate tothe one or more UEs 115 to cancel a transmission in one or moreresources (e.g., time and frequency). For example, the victim basestation 105 may send downlink control information (DCI) 2_4 to a UE 115to indicate to the UE 115 to cancel PUSCH (SRS) transmissions in one ormore time resource, one or more frequency resource, or any combinationthereof. However, this indication (e.g., L1 signaling) may introduce L1overhead, which may cause an inefficient use of communication resourcesand reduce user experience.

In some examples, the described techniques may enable a base station 105to estimate or measure CLI over resources that may also be used foruplink communications while mitigating interference from othercommunications. For example, a UE 115 may receive a message indicatingone or more communication patterns from the base station 105. In somecases, the one or more communication patterns may indicate to the UE 115to adjust a parameter (e.g., wait, use a reduced transmit power, mute,TA) for transmitting an uplink communication during a set of timeresources, a set of beams, a set of ports, or any combination thereof.During the resources indicated in the one or more communicationpatterns, the base station 105 may estimate or measure the CLI. The basestation 105 may then use the CLI to improve the reception of uplinkcommunications during full duplex scenarios. In some cases, the one ormore communication patterns may indicate a hopping pattern. The hoppingpattern may indicate each subband of a BWP that the base station 105 mayuse to measure CLI for at least one time resource. In some cases, thebase station 105 may configure the UE 115 with a TA based on themessage. In some examples, the base station 105 may use one or moretypes of resources (e.g., a downlink resource or a flexible resourceconverted to a downlink resource) for measuring CLI.

FIG. 2 illustrates an example of a wireless communications system 200that supports signaling for inter-base station interference estimationin accordance with aspects of the present disclosure. In some examples,the wireless communications system 200 may implement aspects of thewireless communications system 100. The wireless communications system200 may include a UE 115-a, a base station 105-a and a base station105-b, which may be examples of a UE 115 and a base station 105respectively, as described herein with reference to FIG. 1 . In somecases, the base station 105-a may be an example of a victim base station105 and the base station 105-b may be an example of an aggressor basestation 105, as described herein with reference to FIG. 1 .

In some examples, wireless communications sent by the base station 105-bmay interfere with wireless communications sent by the UE 115-a to thebase station 105-a. For example, the base station 105-a may receiveuplink communication from the UE 115-a over an uplink beam 205. Usingthe same time and frequency resources, the base station 105-b maytransmit over a downlink beam 210. When the base station 105-b transmitsover the downlink beam 210 in a same direction as the UE 115-a transmitsover the uplink beam 205, then the transmission on the downlink beam 210may interfere with the transmission on the uplink beam 205 (e.g., CLI).In some cases, the strength of the interference may be inconsistent(e.g., signal strength, direction of transmission). Due to variousvariables (e.g., environmental effects, transmit power, otherinterference), a signal strength of the downlink beam 210 may interferewith the uplink beam 205 at differing levels. In some cases, the closerthe base station 105-b transmits over the downlink beam 210 in the samedirection as the uplink beam 205 the greater the CLI may be. While thedescription of CLI is discussed with reference to the UE 115-a and thebase station 105-b, CLI may occur during any signaling interference on achannel that the base station 105-a may use to receive uplinkcommunications (e.g., from one or more UEs 115) as described withreference to FIG. 1 .

In some cases, the base station 105-a may measure or estimate the CLIchannel between the base station 105-a and the base station 105-b inorder to perform CLI mitigating procedures. The base station 105-a maytransmit a message 215 to the UE 115-a. In some cases, the message 215may indicate one or more communication patterns for one or moreresources. The one or more communication patterns may include a set ofhopping patterns, a set of muting patterns, or any combination thereof.The set of muting patterns may indicate a parameter adjustment (e.g.,wait, use a reduced transmit power, mute) for uplink communications. Forexample, the one or more communication patterns may include a set ofmuting patterns that indicate time resources (symbols) where the UE115-a may cancel uplink transmissions (e.g., transmissions over uplinkbeam 205). The set of muting patterns may be configured as wide-band orsubband-based. In some cases, the muting pattern may include one or moreresources due to an uplink timing from UE 115-a being different from adownlink timing from the base station 105-b, as described in more detailwith reference to FIG. 5 .

In some examples, the one or more resources may be time resources,frequency resources, or any combination thereof, where the one or moreresources may be for measuring CLI on the channel (e.g., inter-basestation CLI channel measurement). The one or more resources may besemi-statically (e.g., periodic or semi-persistent) configured andindicated using layer two (L2) or layer three (L3) signaling. Forexample, the set of muting patterns may be RRC configured. The one ormore resources may be periodic, such that the CLI channel measurementmay occur with a certain frequency. In one example, one or more patternsof the set of muting patterns may be activated or deactivated by L2signaling (e.g., MAC-CE or DCI) for a semi-persistent configuration.

In some cases, the one or more communication patterns indicated by themessage 215 may include an indication of a set of uplink beams torestrict. For example, the base station 105-a may determine to restrictthe UE 115-a from transmitting over the uplink beam 205. Because the UE115-a may transmit over the uplink beam 205 in the same direction as thebase station 105-b may transmit over the downlink beam 210. However, theUE 115-a may transmit over a second uplink beam 220 as the UE 115-a maytransmit over the second uplink beam 220 in a different direction fromthe downlink beam 210. In some examples, restricting the set of uplinkbeams may allow for simultaneous uplink receive and CLI channelmeasurement in a same subband (e.g., for IUD scenarios), or may allowfor isolation in SBFD.

In some cases, the base station 105-a may define a set of restricteduplink beams (e.g., the uplink beam 205). For example, the one or morecommunication patterns may indicate the set of restricted uplink beams.The set of restricted uplink beams may indicate to the UE 115-a whichuplink beams to refrain from transmitting over during CLI channelmeasurement occasions. In the case that the UE 115-a is scheduled totransmit uplink information over one or more restricted uplink beams ofthe set of restricted uplink beams, the UE 115-a may be pre-configuredor configured to skip the transmission or to fallback to transmittingover some preconfigured default beam. In one example, to facilitaterestricting the set of uplink beams, the base station 105-a may use alegacy spatial relation framework.

In some examples, the one or more communication patterns indicated bythe message 215 may include an indication of a set of ports. Forexample, the CLI channel measurement may be a single-port or multi-portmeasurement. In some cases, the base station 105-b may transmit variousdownlink signals (e.g., a synchronization signal block (SSB), amulti-port CSI-RS, a physical data shared channel-demodulation referencesignal (PDSCH-DMRS)) over the downlink beam 210. The quantity of portsindicated in the set of ports may be based on the various downlinksignals. In some cases, the base station 105-a may configure differentmeasurement occasions for single-port and multi-port CLI channelmeasurement.

In some cases, the base station 105-a may select a resource type to usefor CLI channel measurement. In one example, the base station 105-a mayselect a first resource type semi-statically configured as a downlinkresource (e.g., in TDD-UL-DL-configCommon). During the first resourcetype the UE 115-a may refrain from transmitting over the uplink beam205. In some examples, the base station 105-a may transmit aconfiguration message (e.g., an RRC-Reconfiguration message) to changewhich resources to use for the CLI channel measurement.

In one example, the base station 105-a may select a second resource type(e.g., a flexible resource) to use for the CLI channel measurement. Forexample, the base station may select the second resource type andtransmit control signaling (e.g., a DCI, an SFI) to convert the secondresource type to the first resource type (e.g., a downlink resource).The base station 105-a may use the converted resource for CLI channelmeasurement. In some cases, the second resource type may be configuredas a flexible resource in TDD-UL-DL-configCommon,TDD-UL-DL-configDedicated, or any combination thereof. Because the firstresource type is used for measuring the CLI over the channel and the UE115-a may refrain from transmitting uplink communications, the accuracyof the CLI measurement may be improved.

In some examples, the base station 105-a may transmit the controlsignaling (e.g., a DCI with an SFI) to change the one or morecommunication patterns. The UE 115-a may buffer a receive signal on thefirst resource type and the second resource type and resources thatintersect with a search space for which the UE 115-a may perform blinddecodes for physical downlink control channel (PDCCH).

FIG. 3 illustrates an example of a process flow 300 that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure. The process flow 300 may includea UE 115-b, a base station 105-c, and a base station 105-d, which may berespective examples of UEs 115 and base stations 105 as described withreference to FIGS. 1 and 2 . In some cases, the base station 105-d maybe an example of a victim base station 105 and the base station 105-cmay be an example of an aggressor base station 105, as described hereinwith reference to FIGS. 1 and 2 .

Optionally, at 305, the base station 105-d may select one or moreresources for CLI estimation. In some examples, the selected resourcesmay include one or more subbands of frequency resources and one or moreslots of time resources. The selected resources may be resourcesassociated with the base station 105-c and the UE 115-b. For example,the base station 105-c may transmit downlink communications in thedirection of the base station 105-d using the selected resources. The UE115-b may transmit uplink communications to the base station 105-d usingthe selected resources. Because the downlink communications and theuplink communications are using the selected resources, the downlinkcommunications may interfere with the uplink communications at the basestation 105-d (e.g., CLI). The base station 105-d may measure orestimate the CLI channel between the base station 105-c and the basestation 105-d to perform CLI mitigating procedures.

At 310, the base station 105-d may transmit a message to at least the UE115-b. In some cases, the message may include an RRC message andindicate one or more communication patterns of the selected resourcesfor estimating the CLI channel. The one or more communication patternsmay include a set of hopping patterns, a set of muting patterns, or anycombination thereof. The set of muting patterns may indicate a parameteradjustment (e.g., wait, use a reduced transmit power, mute) for uplinkcommunications.

In some examples, a hopping pattern of the set of hopping patterns mayindicate a pattern of subbands across one or more slots of a BWP forestimating the CLI channel. The pattern may indicate at least oneresource (e.g., a time resource) for each subband of the subbands to beused for estimating the CLI channel, such that each subband of the BWPis measured. The indicated resource for estimating the CLI channel mayhop from subband to subband, across the one or more slots, until eachsubband of the BWP has been measured, as described in more detail withreference to FIG. 4 . The hopping pattern may allow for an SBFD fullduplex scenario, where a slot may contain subbands for CLI channelestimation and downlink or uplink communication. In some cases, tomitigate potential interference, a guard band may be included betweenthe subband for CLI channel estimation and the subband for downlink oruplink communication.

Optionally, at 315, the base station 105-d may transmit an activationmessage. The activation message may include L2 signaling (e.g., MAC-CEor DCI) for activating or deactivating a communication pattern of theone or more communication patterns. For example, the communicationpattern may be activated by the base station 105-d before estimating theCLI channel and then deactivated.

Optionally, at 320, the base station 105-d may transmit a TA message. Insome cases, the TA message may comprise a TA for CLI channel estimation.For example, the downlink communications and the uplink communicationsmay be misaligned due to different propagation delays. Because of themisalignment, the CLI channel estimation may be inaccurate. To align thecommunications the base station 105-d may identify a TA for the uplinkcommunications such that an orthogonality between the communications maybe aligned, as described in more detail with reference to FIG. 5 . Thus,the accuracy of the CLI channel estimation may be improved. In somecases, the TA may at least be based on a capability of the UE 115-b.

Optionally, at 325, the UE 115-b may adjust an uplink communicationsparameter based on the indicated parameter adjustment for uplinkcommunications using the selected resources. For example, the UE 115-bmay reduce the transmit power of the uplink communications during atleast a portion of the selected resources. In some cases, the UE 115-bmay reduce the transmit power to an amount greater than zero, to zero,or an amount that is associated with the CLI being below a threshold(e.g., a percent of the original CLI). In one example, the UE 115-b maywait to transmit the uplink communications for an amount of time or skipthe uplink communications.

At 330, the base station 105-d may monitor the selected resources forthe CLI associated with the base station 105-c. In some cases, the basestation 105-d may identify a BWP for estimating the CLI channel. Thebase station 105-d may monitor subbands of the BWP for the CLI channelestimation. In one example, the base station 105-d may monitor thesubbands based on a hopping pattern of the set of hopping patterns, suchthat each subband of the BWP is monitored across one or more slots.

At 335, the base station 105-d may receive the downlink communicationsfrom the base station 105-c as part of monitoring the resources. Thedownlink communications may interfere with the uplink communications atthe base station 105-d (e.g., CLI). In some cases, the strength of theinterference may be inconsistent (e.g., signal strength, direction oftransmission). Due to various variables (e.g., environmental effects,transmit power, other interference), a signal strength of the downlinkcommunications may interfere with the uplink communications at differinglevels. In some cases, the closer the base station 105-c transmits thedownlink communications in the same direction as the uplinkcommunications the greater the CLI.

Optionally, at 340, the UE 115-b may transmit the uplink communicationsto the base station 105-d over the selected resources. These uplinkcommunications may be transmitted using an adjust parameter indicated bythe message 310. In some cases, the UE 115-b may transmit the uplinkcommunications using the selected resources, on designated subbandsbased on the hopping patterns, using the TA for CLI channel estimation,at a reduced transmit power, or any combination thereof. In some cases,the UE 115-b may refrain from transmitting the uplink communicationsover one or more beams indicated by the one or more communicationpatterns. The UE 115-b may determine to skip the uplink communicationsor use a different beam than the one or more beams.

At 345, the base station 105-d may estimate or measure the CLI channelbetween the base station 105-d and the base station 105-c. The CLIbetween the two base stations may be used in future communications toimprove the reliability of decoding and account for the CLI.

At 350, the base station 105-d may process other uplink communicationsover resources using the estimated CLI channel. In some cases, theresource may be full duplexed with one or more of the downlinkcommunications associated with the base station 105-c. The base station105-d may process the uplink communications based on the estimating.

FIGS. 4A and 4B illustrate examples of a communication pattern 400-a anda communication pattern 400-b that supports signaling for inter-basestation interference estimation in accordance with aspects of thepresent disclosure. The communication pattern 400-a and thecommunication pattern 400-b may be examples of the one or morecommunication patterns of the wireless communications system 100, thewireless communications system 200, and the process flow 300, asdescribed with reference to FIGS. 1-3 . For example, one or both of thecommunication pattern 400-a and the communication pattern 400-b may beimplemented by one or both of a base station 105 or a UE 115 to supportmeasuring interference for full duplex communications. While thecommunication pattern 400-a and the communication pattern 400-b areillustrated as examples, there may be many more similar patterns tomeasure CLI channel interference that are supported by the describedtechniques herein.

In some examples, a base station 105 may measure a channel for CLI andreceive uplink communications. However, the received uplinkcommunications may be misaligned in time with the CLI channelmeasurement, which may cause inter-channel interference (ICI) and reducethe quality (accuracy) of the CLI channel measurement. In some cases, abase station 105 may configure CLI channel measurements in SBFD slots ofa BWP. A UE 115 may transmit the uplink communications over an SBFD slotat a first subband. The base station 105 may measure for CLI over theSBFD slot at a second subband (e.g., a same time occasion) to performCLI mitigating procedures based on the measurement. Because the basestation 105 configures the uplink communications and the CLI channelmeasurement on different subbands (e.g., the first subband and thesecond subband), frequency isolation between the different subbands maymitigate the ICI caused by time misalignment between the uplinkcommunications and the CLI channel measurement. To further isolate thedifferent subbands, the base station 105 may configure guard bandsbetween uplink subbands, downlink subbands, subbands for CLImeasurement, or any combination thereof. In some examples, to measureCLI over each subband of the BWP, the base station 105 may configurehopping patterns.

For example, the base station 105 may transmit a message (e.g., themessage 215) that indicates one or more communication patterns for oneor more slots and resources of the BWP. In order to receive uplinkcommunications (e.g., the uplink beam 205) and simultaneously measurefor CLI on a channel (e.g., the BWP) the one or more communicationpatterns may indicate a hopping pattern. For example, the hoping patternmay relate to a BWP 405-a or a BWP 405-b. The BWPs 405-a and 405-b mayinclude multiple slots and resources. In some cases, the multiple slotsmay include half duplex slots, full duplex (e.g., SBFD) slots, or both.The SBFD full duplex slots may include various subbands for CLImeasurement resources, uplink resources, downlink resources, and guardbands (sometimes referred to as GBs).

In the example of FIG. 4A, the BWP 405-a may include various half duplexand full duplex slots. In some examples, the base station 105 maymeasure each subband of the BWP 405-a for an accurate CLI measurement.The hopping pattern may indicate different SBFD full duplex slotconfigurations such that each subband includes a CLI channel measurementoccasion for at least one time resource. A slot 410-a and a slot 410-bmay be examples of an SBFD full duplex slot. The slots 410-a and 410-bmay include resources for CLI channel measurement, downlinkcommunication, and uplink communication. For example, the slot 410-a mayinclude an uplink signal 415-a at a second subband. The slot 410-a mayfurther include a downlink signal 420-a at a first subband and adownlink signal 420-b at a third subband. The downlink signals 420-a and420-b may include CLI measurement occasions 430-a and 430-brespectively. To increase frequency isolation, and thereby increase theaccuracy of the CLI channel estimation, the slot 410-a may include a GB425-a and a GB 425-b between the uplink signal 415-a and the downlinksignals 420-a and 420-b.

The slot 410-b may include the resources for CLI channel measurement,downlink communication, and uplink communication in a differentconfiguration such that each subband of the BWP is measured for CLI. Forexample, the slot 410-b may include uplink signals 415-b and 415-c atthe first and third subbands respectively. The slot 410-a may furtherinclude a downlink signal 420-c at the second subband, where thedownlink signal 420-c may include a CLI measurement occasion 430-c. Topromote frequency isolation, the slot 410-b may include a GB 425-c and aGB 425-d between the uplink signals 415-b and 415-c and the downlinksignal 420-c. In some cases, the CLI measurement occasions 430-a, 430-b,and 430-c consist of one or more resources in their respective subband(e.g., two symbols).

In the example of FIG. 4B, the BWP 405-b may include various half duplexand full duplex slots. In some examples, a half-duplex slot may refer toa slot that is assigned to uplink communications or downlinkcommunications for the base stations or cells that could interfere withone another. In some examples, a full-duplex slot may refer to a slotthat is configurable for uplink or downlink by different base stations.Various combinations of slot configurations may cause CLI in afull-duplex slot. In some examples, the base station 105 may measureeach subband of the BWP 405-b for an accurate CLI measurement. Thehopping pattern may indicate different SBFD full duplex slotconfigurations such that each subband includes a CLI channel measurementoccasion for at least one time resource. A slot 410-c, a slot 410-d, anda slot 410-e may be examples of an SBFD full duplex slot. The slots410-c, 410-d, and 410-e may include resources for CLI channelmeasurement, downlink communication, and uplink communication. Forexample, the slot 410-c may include a downlink signal 420-d at a firstsubband, an uplink signal 415-d at a second subband, and a CLImeasurement occasion 430-d at a third subband. To promote frequencyisolation, and thereby increase the accuracy of the CLI channelmeasurement, the slot 410-c may include a GB 425-e between the uplinksignal 415-d and the CLI measurement occasion 430-d. The slot 410-d mayinclude a downlink signal 420-e at the third subband, an uplink signal415-e at the second subband, and a CLI measurement occasion 430-e at thefirst subband. To promote frequency isolation, the slot 410-d mayinclude a GB 425-f between the uplink signal 415-e and the CLImeasurement occasion 430-e. The slot 410-e may include a downlink signal420-f at the third subband, an uplink signal 415-f at the first subband,and a CLI measurement occasion 430-f at the second subband. To promotefrequency isolation, the slot 410-e may include a GB 425-g between theuplink signal 415-f and the CLI measurement occasion 430-f. In someexamples, the CLI measurement occasions 430-d, 430-e, and 430-f may spantheir entire slot (e.g., each time resource of their respective slot).In these cases, the CLI measurement occasions 430-d, 430-e, and 430-fmay use different receive beams.

FIG. 5 illustrates an example of a timing diagram 500 that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure. The timing diagram 500 includesa first base station 105, a second base station 105, and a UE 115, whichmay be examples of a base station 105 and a UE 115 respectively, asdescribed herein with reference to FIG. 1 . In some cases, the firstbase station 105 may be an example of a victim base station 105 and thesecond base station 105 may be an example of an aggressor base station105, as described herein with reference to FIGS. 1 and 2 . The timingdiagram 500 includes a first TA configuration 525-a and a second TAconfiguration 525-b. In some examples, the first TA configuration 525-amay be an example of communication with CLI and the second TAconfiguration 525-b may be an example of a CLI measuring or estimatingprocedure.

In some cases, in an SBFD scenario, the timing misalignment for CLIchannel measurement or estimation may cause an inaccurate CLImeasurement. A time resource that the first base station 105 receives anuplink communication may be different than a time resource that thefirst base station 105 measures a channel for CLI from the second basestation 105 (e.g., a downlink communication from the second base station105). For example, the second base station 105 may transmit a downlinkmessage 515-a at a time t₁. The UE 115 may transmit an uplink message520-a at a time t₂, to the first base station 105, using a first TA505-a. The first base station 105 may transmit a downlink message 516-ato the UE 115 at a time t₃, where the first TA 505-a may be an advanceoffset compared to the downlink message 516-a. By applying a TA to firsttransmission, both the first transmission and a second transmission mayarrive at a receiving device at or near the same time. A first distancefrom the UE 115 to the first base station 105 may be less than a seconddistance from the second base station 105 to the first base station 105.Because the first distance is less than the second distance apropagation delay 510-a may be shorter in time than a propagation delay510-b. The first base station 105 may receive the uplink message 520-aat a time t₄ and may receive the downlink message 515-a at a time t₅based on the different propagation delays 510-a and 510-b. In somecases, the first distance may be less than, greater than, or equal tothe second distance. Because the UE 115 has a different delay than thesecond base station 105, a first CP of the uplink communication and asecond CP of the downlink communication may not overlap in time. Thus,an orthogonality between the communications may be misaligned and thequality of an estimation of CLI on the channel may be reduced. In someexamples, the different propagation delays may be due to the UE 115having a different TA while the second base station 105 has no TA andeach device being located at a different distance from the first basestation 105, among other examples.

In some examples, the time t₄ may be equal to the time t₃, the time t₁may be equal to the time t₃ (e.g., if a downlink transmission timing isaligned at the first base station 105 and the second base station 105),or any combination thereof.

In order to reduce the offset between the uplink communication and theCLI channel measurement timing, the first base station 105 may configureone or more UEs 115 with different TA values for CLI measurementoccasions. By reducing the offset, an ICI between the uplinkcommunication and the CLI channel measurement may be reduced. Forexample, to align the orthogonality between the communications, thefirst base station 105 may transmit a message (e.g., the message 215) tothe UE 115. The message may include a second TA 505-b based on the CLImeasuring procedure. The UE 115 may use the second TA 505-b fordetermining at what time to transmit an uplink message 520-b. The firstbase station 105 may calculate the second TA 505-b based on apropagation delay 510-a and a propagation delay 510-b of the UE 115 andthe second base station 105 respectively.

Thus, the first base station 105 may calculate the second TA 505-b suchthat the orthogonality between the communications may be aligned. Forexample, at time t₆, the second base station 105 may transmit a downlinkmessage 515-b. The UE 115 may transmit an uplink message 520-b at a timet₇ based on the second TA 505-b. The first base station 105 may transmita downlink message 516-b to the UE 115 at a time t₈, where the second TA505-b may be an advance offset compared to the downlink message 516-b.After the propagation delay 510-a and the propagation delay 510-b, at atime t₉, the first base station 105 may receive the uplink message 520-band the downlink message 515-b. In some cases, the first base station105 may receive the uplink message 520-b and the downlink message 515-bat different times, but with overlapping time resources during theirrespective CP. Because the CPs overlap in time, the orthogonalitybetween the messages may be aligned and the quality of the estimation ofCLI may be improved.

In some cases, the second TA 505-b may be a zero or negative TA value toreduce the timing offset with the CLI channel measurement. If the secondTA 505-b is the zero or negative TA value, consecutive uplink anddownlink resource scheduling for the UE 115 may be restricted. Forexample, the first base station 105 may configure a guard resourcebetween the consecutive downlink resource and the consecutive uplinkresource for the UE 115.

In some cases, the UE 115 may apply the second TA 505-b. Thus, acapability of the UE 115 may determine the applicability of the secondTA 505-b as a procedure for measuring CLI on the channel. For example,the UE 115 may transmit UE capability information to the first basestation 105. The UE capability information may indicate that the UE 115may apply the second TA 505-b. The first base station 105 may determinewhether to transmit the second TA 505-b based on the indication.

FIG. 6 shows a block diagram 600 of a device 605 that supports signalingfor inter-base station interference estimation in accordance withaspects of the present disclosure. The device 605 may be an example ofaspects of a UE 115 as described herein. The device 605 may include areceiver 610, a transmitter 615, and a communications manager 620. Thedevice 605 may also include a processor. Each of these components may bein communication with one another (e.g., via one or more buses).

The receiver 610 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to signaling for inter-basestation interference estimation). Information may be passed on to othercomponents of the device 605. The receiver 610 may utilize a singleantenna or a set of multiple antennas.

The transmitter 615 may provide a means for transmitting signalsgenerated by other components of the device 605. For example, thetransmitter 615 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to signaling for inter-base station interferenceestimation). In some examples, the transmitter 615 may be co-locatedwith a receiver 610 in a transceiver module. The transmitter 615 mayutilize a single antenna or a set of multiple antennas.

The communications manager 620, the receiver 610, the transmitter 615,or various combinations thereof or various components thereof may beexamples of means for performing various aspects of signaling forinter-base station interference estimation as described herein. Forexample, the communications manager 620, the receiver 610, thetransmitter 615, or various combinations or components thereof maysupport a method for performing one or more of the functions describedherein.

In some examples, the communications manager 620, the receiver 610, thetransmitter 615, or various combinations or components thereof may beimplemented in hardware (e.g., in communications management circuitry).The hardware may include a processor, a digital signal processor (DSP),an application-specific integrated circuit (ASIC), a field-programmablegate array (FPGA) or other programmable logic device, a discrete gate ortransistor logic, discrete hardware components, or any combinationthereof configured as or otherwise supporting a means for performing thefunctions described in the present disclosure. In some examples, aprocessor and memory coupled with the processor may be configured toperform one or more of the functions described herein (e.g., byexecuting, by the processor, instructions stored in the memory).

Additionally or alternatively, in some examples, the communicationsmanager 620, the receiver 610, the transmitter 615, or variouscombinations or components thereof may be implemented in code (e.g., ascommunications management software or firmware) executed by a processor.If implemented in code executed by a processor, the functions of thecommunications manager 620, the receiver 610, the transmitter 615, orvarious combinations or components thereof may be performed by ageneral-purpose processor, a DSP, a central processing unit (CPU), anASIC, an FPGA, or any combination of these or other programmable logicdevices (e.g., configured as or otherwise supporting a means forperforming the functions described in the present disclosure).

In some examples, the communications manager 620 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the receiver 610, the transmitter615, or both. For example, the communications manager 620 may receiveinformation from the receiver 610, send information to the transmitter615, or be integrated in combination with the receiver 610, thetransmitter 615, or both to receive information, transmit information,or perform various other operations as described herein.

The communications manager 620 may support wireless communication at aUE in accordance with examples as disclosed herein. For example, thecommunications manager 620 may be configured as or otherwise support ameans for receiving, from a first base station, a message that indicatesone or more communication patterns of one or more resources forestimating a CLI channel between uplink communications associated withthe first base station and downlink communications associated with asecond base station. The communications manager 620 may be configured asor otherwise support a means for adjusting a transmission parameter foran uplink communication based on receiving the message from the firstbase station. The communications manager 620 may be configured as orotherwise support a means for transmitting the uplink communication overthe one or more resources based on adjusting the transmission parameter.

By including or configuring the communications manager 620 in accordancewith examples as described herein, the device 605 (e.g., a processorcontrolling or otherwise coupled to the receiver 610, the transmitter615, the communications manager 620, or a combination thereof) maysupport techniques for more efficient utilization of communicationresources and more accurate CLI channel estimation.

FIG. 7 shows a block diagram 700 of a device 705 that supports signalingfor inter-base station interference estimation in accordance withaspects of the present disclosure. The device 705 may be an example ofaspects of a device 605 or a UE 115 as described herein. The device 705may include a receiver 710, a transmitter 715, and a communicationsmanager 720. The device 705 may also include a processor. Each of thesecomponents may be in communication with one another (e.g., via one ormore buses).

The receiver 710 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to signaling for inter-basestation interference estimation). Information may be passed on to othercomponents of the device 705. The receiver 710 may utilize a singleantenna or a set of multiple antennas.

The transmitter 715 may provide a means for transmitting signalsgenerated by other components of the device 705. For example, thetransmitter 715 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to signaling for inter-base station interferenceestimation). In some examples, the transmitter 715 may be co-locatedwith a receiver 710 in a transceiver module. The transmitter 715 mayutilize a single antenna or a set of multiple antennas.

The device 705, or various components thereof, may be an example ofmeans for performing various aspects of signaling for inter-base stationinterference estimation as described herein. For example, thecommunications manager 720 may include a messaging manager 725, aninterference manager 730, an uplink manager 735, or any combinationthereof. The communications manager 720 may be an example of aspects ofa communications manager 620 as described herein. In some examples, thecommunications manager 720, or various components thereof, may beconfigured to perform various operations (e.g., receiving, monitoring,transmitting) using or otherwise in cooperation with the receiver 710,the transmitter 715, or both. For example, the communications manager720 may receive information from the receiver 710, send information tothe transmitter 715, or be integrated in combination with the receiver710, the transmitter 715, or both to receive information, transmitinformation, or perform various other operations as described herein.

The communications manager 720 may support wireless communication at aUE in accordance with examples as disclosed herein. The messagingmanager 725 may be configured as or otherwise support a means forreceiving, from a first base station, a message that indicates one ormore communication patterns of one or more resources for estimating aCLI channel between uplink communications associated with the first basestation and downlink communications associated with a second basestation. The interference manager 730 may be configured as or otherwisesupport a means for adjusting a transmission parameter for an uplinkcommunication based on receiving the message from the first basestation. The uplink manager 735 may be configured as or otherwisesupport a means for transmitting the uplink communication over the oneor more resources based on adjusting the transmission parameter.

FIG. 8 shows a block diagram 800 of a communications manager 820 thatsupports signaling for inter-base station interference estimation inaccordance with aspects of the present disclosure. The communicationsmanager 820 may be an example of aspects of a communications manager620, a communications manager 720, or both, as described herein. Thecommunications manager 820, or various components thereof, may be anexample of means for performing various aspects of signaling forinter-base station interference estimation as described herein. Forexample, the communications manager 820 may include a messaging manager825, an interference manager 830, an uplink manager 835, a power manager840, a frequency manager 845, a hopping pattern manager 850, a TAmanager 855, a beam manager 860, or any combination thereof. Each ofthese components may communicate, directly or indirectly, with oneanother (e.g., via one or more buses).

The communications manager 820 may support wireless communication at aUE in accordance with examples as disclosed herein. The messagingmanager 825 may be configured as or otherwise support a means forreceiving, from a first base station, a message that indicates one ormore communication patterns of one or more resources for estimating aCLI channel between uplink communications associated with the first basestation and downlink communications associated with a second basestation. The interference manager 830 may be configured as or otherwisesupport a means for adjusting a transmission parameter for an uplinkcommunication based on receiving the message from the first basestation. The uplink manager 835 may be configured as or otherwisesupport a means for transmitting the uplink communication over the oneor more resources based on adjusting the transmission parameter.

In some examples, the messaging manager 825 may be configured as orotherwise support a means for receiving, from the first base station, asecond message to activate a communication pattern of the one or morecommunication patterns, where adjusting a transmission parameter for theuplink communication is based on receiving the second message.

In some examples, the message includes a radio resource control message.In some examples, the second message includes a medium accesscontrol-control element or downlink control information.

In some examples, to support adjusting the transmission parameter forthe uplink communication, the power manager 840 may be configured as orotherwise support a means for reducing the transmit power of the uplinkcommunications during at least a portion of the one or more resources.

In some examples, to support reducing the transmit power of the uplinkcommunications, the power manager 840 may be configured as or otherwisesupport a means for reducing the transmit power of the uplinkcommunications to zero during the portion of the one or more resources.

In some examples, the frequency manager 845 may be configured as orotherwise support a means for identifying a first subband of a BWP forestimating the CLI channel, a second subband of the BWP for a seconduplink communication by the UE, and a third subband of the BWP as aguard band between the first subband and the second subband based onreceiving the message, the one or more resources including the BWP,where the one or more communication patterns included in the messageindicate the first subband, the second subband, and the third subband,where adjusting a transmission parameter for the uplink communication isbased on the identifying.

In some examples, the frequency manager 845 may be configured as orotherwise support a means for transmitting, over the second subband, theuplink communication to the first base station based on transmitting themessage.

In some examples, the hopping pattern manager 850 may be configured asor otherwise support a means for identifying a hopping pattern ofsubbands of a BWP for estimating the CLI channel and transmitting theuplink communications based on receiving the message, the hoppingpattern spanning a set of multiple slots, where the one or morecommunication patterns indicate the hopping pattern, where adjusting atransmission parameter for the uplink communication is based on theidentifying.

In some examples, the hopping pattern indicates at least one timeresource for each subband of the subbands of the BWP for estimating theCLI channel.

In some examples, to support adjusting the transmission parameter forthe uplink communication, the TA manager 855 may be configured as orotherwise support a means for applying a TA for the uplink communicationtransmitted by the UE during a first time resource of the one or moreresources based on receiving the message, the TA based on a propagationdelay of a downlink communication transmitted by the second basestation. In some examples, the TA is based on a capability of the UE.

In some examples, to support adjusting the transmission parameter forthe uplink communication, the beam manager 860 may be configured as orotherwise support a means for identifying one or more beams to restrictthe UE from using to transmit the uplink communication during the one ormore resources, where the message indicates the one or more beams.

In some examples, the beam manager 860 may be configured as or otherwisesupport a means for receiving, from the first base station, a secondmessage that schedules the UE with the uplink communication using theone or more beams. In some examples, the beam manager 860 may beconfigured as or otherwise support a means for determining to skip theuplink communication or use a different beam than the one or more beamsbased on the one or more communication patterns.

In some examples, the frequency manager 845 may be configured as orotherwise support a means for identifying one or more subbands offrequency resources or one or more slots of time resources or both forestimating the CLI channel, where the message includes an indication ofthe one or more subbands or the one or more slots.

In some examples, the one or more resources include one or more subbandsof frequency resources and one or more slots of time resources.

In some examples, the one or more communication patterns indicate to theUE to mute or reduce a transmit power of one or more uplinkcommunications during a set of time resources of the one or moreresources. In some examples, the one or more communication patternsindicate a set of beams that the UE is restricted from using for theuplink communications. In some examples, the one or more communicationpatterns indicate one or more ports for estimating the CLI channel.

In some examples, the first base station is configured to receive theuplink communications over the one or more resources. In some examples,the second base station is configured to transmit the downlinkcommunications over the one or more resources.

FIG. 9 shows a diagram of a system 900 including a device 905 thatsupports signaling for inter-base station interference estimation inaccordance with aspects of the present disclosure. The device 905 may bean example of or include the components of a device 605, a device 705,or a UE 115 as described herein. The device 905 may communicatewirelessly with one or more base stations 105, UEs 115, or anycombination thereof. The device 905 may include components forbi-directional voice and data communications including components fortransmitting and receiving communications, such as a communicationsmanager 920, an input/output (I/O) controller 910, a transceiver 915, anantenna 925, a memory 930, code 935, and a processor 940. Thesecomponents may be in electronic communication or otherwise coupled(e.g., operatively, communicatively, functionally, electronically,electrically) via one or more buses (e.g., a bus 945).

The I/O controller 910 may manage input and output signals for thedevice 905. The I/O controller 910 may also manage peripherals notintegrated into the device 905. In some cases, the I/O controller 910may represent a physical connection or port to an external peripheral.In some cases, the I/O controller 910 may utilize an operating systemsuch as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, oranother known operating system. Additionally, or alternatively, the I/Ocontroller 910 may represent or interact with a modem, a keyboard, amouse, a touchscreen, or a similar device. In some cases, the I/Ocontroller 910 may be implemented as part of a processor, such as theprocessor 940. In some cases, a user may interact with the device 905via the I/O controller 910 or via hardware components controlled by theI/O controller 910.

In some cases, the device 905 may include a single antenna 925. However,in some other cases, the device 905 may have more than one antenna 925,which may be capable of concurrently transmitting or receiving multiplewireless transmissions. The transceiver 915 may communicatebi-directionally, via the one or more antennas 925, wired, or wirelesslinks as described herein. For example, the transceiver 915 mayrepresent a wireless transceiver and may communicate bi-directionallywith another wireless transceiver. The transceiver 915 may also includea modem to modulate the packets, to provide the modulated packets to oneor more antennas 925 for transmission, and to demodulate packetsreceived from the one or more antennas 925. The transceiver 915, or thetransceiver 915 and one or more antennas 925, may be an example of atransmitter 615, a transmitter 715, a receiver 610, a receiver 710, orany combination thereof or component thereof, as described herein.

The memory 930 may include random access memory (RAM) and read-onlymemory (ROM). The memory 930 may store computer-readable,computer-executable code 935 including instructions that, when executedby the processor 940, cause the device 905 to perform various functionsdescribed herein. The code 935 may be stored in a non-transitorycomputer-readable medium such as system memory or another type ofmemory. In some cases, the code 935 may not be directly executable bythe processor 940 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein. In some cases, thememory 930 may contain, among other things, a basic I/O system (BIOS)which may control basic hardware or software operation such as theinteraction with peripheral components or devices.

The processor 940 may include an intelligent hardware device (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 940 may be configured to operate a memoryarray using a memory controller. In some other cases, a memorycontroller may be integrated into the processor 940. The processor 940may be configured to execute computer-readable instructions stored in amemory (e.g., the memory 930) to cause the device 905 to perform variousfunctions (e.g., functions or tasks supporting signaling for inter-basestation interference estimation). For example, the device 905 or acomponent of the device 905 may include a processor 940 and memory 930coupled to the processor 940, the processor 940 and memory 930configured to perform various functions described herein.

The communications manager 920 may support wireless communication at aUE in accordance with examples as disclosed herein. For example, thecommunications manager 920 may be configured as or otherwise support ameans for receiving, from a first base station, a message that indicatesone or more communication patterns of one or more resources forestimating a CLI channel between uplink communications associated withthe first base station and downlink communications associated with asecond base station. The communications manager 920 may be configured asor otherwise support a means for adjusting a transmission parameter foran uplink communication based on receiving the message from the firstbase station. The communications manager 920 may be configured as orotherwise support a means for transmitting the uplink communication overthe one or more resources based on adjusting the transmission parameter.

By including or configuring the communications manager 920 in accordancewith examples as described herein, the device 905 may support techniquesfor more efficient utilization of communication resources and improveduser experience related to reduced interference.

In some examples, the communications manager 920 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the transceiver 915, the one ormore antennas 925, or any combination thereof. Although thecommunications manager 920 is illustrated as a separate component, insome examples, one or more functions described with reference to thecommunications manager 920 may be supported by or performed by theprocessor 940, the memory 930, the code 935, or any combination thereof.For example, the code 935 may include instructions executable by theprocessor 940 to cause the device 905 to perform various aspects ofsignaling for inter-base station interference estimation as describedherein, or the processor 940 and the memory 930 may be otherwiseconfigured to perform or support such operations.

FIG. 10 shows a block diagram 1000 of a device 1005 that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure. The device 1005 may be anexample of aspects of a base station 105 as described herein. The device1005 may include a receiver 1010, a transmitter 1015, and acommunications manager 1020. The device 1005 may also include aprocessor. Each of these components may be in communication with oneanother (e.g., via one or more buses).

The receiver 1010 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to signaling for inter-basestation interference estimation). Information may be passed on to othercomponents of the device 1005. The receiver 1010 may utilize a singleantenna or a set of multiple antennas.

The transmitter 1015 may provide a means for transmitting signalsgenerated by other components of the device 1005. For example, thetransmitter 1015 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to signaling for inter-base station interferenceestimation). In some examples, the transmitter 1015 may be co-locatedwith a receiver 1010 in a transceiver module. The transmitter 1015 mayutilize a single antenna or a set of multiple antennas.

The communications manager 1020, the receiver 1010, the transmitter1015, or various combinations thereof or various components thereof maybe examples of means for performing various aspects of signaling forinter-base station interference estimation as described herein. Forexample, the communications manager 1020, the receiver 1010, thetransmitter 1015, or various combinations or components thereof maysupport a method for performing one or more of the functions describedherein.

In some examples, the communications manager 1020, the receiver 1010,the transmitter 1015, or various combinations or components thereof maybe implemented in hardware (e.g., in communications managementcircuitry). The hardware may include a processor, a DSP, an ASIC, anFPGA or other programmable logic device, a discrete gate or transistorlogic, discrete hardware components, or any combination thereofconfigured as or otherwise supporting a means for performing thefunctions described in the present disclosure. In some examples, aprocessor and memory coupled with the processor may be configured toperform one or more of the functions described herein (e.g., byexecuting, by the processor, instructions stored in the memory).

Additionally or alternatively, in some examples, the communicationsmanager 1020, the receiver 1010, the transmitter 1015, or variouscombinations or components thereof may be implemented in code (e.g., ascommunications management software or firmware) executed by a processor.If implemented in code executed by a processor, the functions of thecommunications manager 1020, the receiver 1010, the transmitter 1015, orvarious combinations or components thereof may be performed by ageneral-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or anycombination of these or other programmable logic devices (e.g.,configured as or otherwise supporting a means for performing thefunctions described in the present disclosure).

In some examples, the communications manager 1020 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the receiver 1010, thetransmitter 1015, or both. For example, the communications manager 1020may receive information from the receiver 1010, send information to thetransmitter 1015, or be integrated in combination with the receiver1010, the transmitter 1015, or both to receive information, transmitinformation, or perform various other operations as described herein.

The communications manager 1020 may support wireless communication at afirst base station in accordance with examples as disclosed herein. Forexample, the communications manager 1020 may be configured as orotherwise support a means for transmitting, to a UE, a message thatindicates one or more communication patterns of one or more resourcesfor estimating a CLI channel between the first base station and a secondbase station, the first base station configured to receive uplinkcommunications over the one or more resources. The communicationsmanager 1020 may be configured as or otherwise support a means formonitoring the one or more resources for CLI associated with the secondbase station based on transmitting the message. The communicationsmanager 1020 may be configured as or otherwise support a means forprocessing a first uplink communication from the UE communicated over aresource full duplexed with one or more downlink communicationsassociated with the second base station based on monitoring the one ormore resources for the CLI.

Additionally, or alternatively, the communications manager 1020 maysupport wireless communication at a first base station in accordancewith examples as disclosed herein. For example, the communicationsmanager 1020 may be configured as or otherwise support a means fortransmitting a message indicating a first resource including a firsttype of resource or a second resource including a second type ofresource to use for estimating a CLI channel between the first basestation and a second base station, where the first base station isconfigured to receive uplink communications or transmit downlinkcommunications to a UE over the first type of resource and the firstbase station is configured to transmit the downlink communications tothe UE over the second type of resource. The communications manager 1020may be configured as or otherwise support a means for monitoring one ormore resources for CLI associated with the second base station based ontransmitting the message. The communications manager 1020 may beconfigured as or otherwise support a means for processing a first uplinkcommunication from the UE over a full-duplex resource based onmonitoring the one or more resources for the CLI.

By including or configuring the communications manager 1020 inaccordance with examples as described herein, the device 1005 (e.g., aprocessor controlling or otherwise coupled to the receiver 1010, thetransmitter 1015, the communications manager 1020, or a combinationthereof) may support techniques for more efficient utilization ofcommunication resources and more accurate CLI channel estimation.

FIG. 11 shows a block diagram 1100 of a device 1105 that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure. The device 1105 may be anexample of aspects of a device 1005 or a base station 105 as describedherein. The device 1105 may include a receiver 1110, a transmitter 1115,and a communications manager 1120. The device 1105 may also include aprocessor. Each of these components may be in communication with oneanother (e.g., via one or more buses).

The receiver 1110 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to signaling for inter-basestation interference estimation). Information may be passed on to othercomponents of the device 1105. The receiver 1110 may utilize a singleantenna or a set of multiple antennas.

The transmitter 1115 may provide a means for transmitting signalsgenerated by other components of the device 1105. For example, thetransmitter 1115 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to signaling for inter-base station interferenceestimation). In some examples, the transmitter 1115 may be co-locatedwith a receiver 1110 in a transceiver module. The transmitter 1115 mayutilize a single antenna or a set of multiple antennas.

The device 1105, or various components thereof, may be an example ofmeans for performing various aspects of signaling for inter-base stationinterference estimation as described herein. For example, thecommunications manager 1120 may include a messaging manager 1125 aninterference manager 1130, or any combination thereof. Thecommunications manager 1120 may be an example of aspects of acommunications manager 1020 as described herein. In some examples, thecommunications manager 1120, or various components thereof, may beconfigured to perform various operations (e.g., receiving, monitoring,transmitting) using or otherwise in cooperation with the receiver 1110,the transmitter 1115, or both. For example, the communications manager1120 may receive information from the receiver 1110, send information tothe transmitter 1115, or be integrated in combination with the receiver1110, the transmitter 1115, or both to receive information, transmitinformation, or perform various other operations as described herein.

The communications manager 1120 may support wireless communication at afirst base station in accordance with examples as disclosed herein. Themessaging manager 1125 may be configured as or otherwise support a meansfor transmitting, to a UE, a message that indicates one or morecommunication patterns of one or more resources for estimating a CLIchannel between the first base station and a second base station, thefirst base station configured to receive uplink communications over theone or more resources. The interference manager 1130 may be configuredas or otherwise support a means for monitoring the one or more resourcesfor CLI associated with the second base station based on transmittingthe message. The interference manager 1130 may be configured as orotherwise support a means for processing a first uplink communicationfrom the UE communicated over a resource full duplexed with one or moredownlink communications associated with the second base station based onmonitoring the one or more resources for the CLI.

Additionally, or alternatively, the communications manager 1120 maysupport wireless communication at a first base station in accordancewith examples as disclosed herein. The messaging manager 1125 may beconfigured as or otherwise support a means for transmitting a messageindicating a first resource including a first type of resource or asecond resource including a second type of resource to use forestimating a CLI channel between the first base station and a secondbase station, where the first base station is configured to receiveuplink communications or transmit downlink communications to a UE overthe first type of resource and the first base station is configured totransmit the downlink communications to the UE over the second type ofresource. The interference manager 1130 may be configured as orotherwise support a means for monitoring one or more resources for CLIassociated with the second base station based on transmitting themessage. The interference manager 1130 may be configured as or otherwisesupport a means for processing a first uplink communication from the UEover a full-duplex resource based on monitoring the one or moreresources for the CLI.

FIG. 12 shows a block diagram 1200 of a communications manager 1220 thatsupports signaling for inter-base station interference estimation inaccordance with aspects of the present disclosure. The communicationsmanager 1220 may be an example of aspects of a communications manager1020, a communications manager 1120, or both, as described herein. Thecommunications manager 1220, or various components thereof, may be anexample of means for performing various aspects of signaling forinter-base station interference estimation as described herein. Forexample, the communications manager 1220 may include a messaging manager1225, an interference manager 1230, a power manager 1235, a frequencymanager 1240, a hopping pattern manager 1245, a TA manager 1250, a beammanager 1255, or any combination thereof. Each of these components maycommunicate, directly or indirectly, with one another (e.g., via one ormore buses).

The communications manager 1220 may support wireless communication at afirst base station in accordance with examples as disclosed herein. Themessaging manager 1225 may be configured as or otherwise support a meansfor transmitting, to a UE, a message that indicates one or morecommunication patterns of one or more resources for estimating a CLIchannel between the first base station and a second base station, thefirst base station configured to receive uplink communications over theone or more resources. The interference manager 1230 may be configuredas or otherwise support a means for monitoring the one or more resourcesfor CLI associated with the second base station based on transmittingthe message. In some examples, the interference manager 1230 may beconfigured as or otherwise support a means for processing a first uplinkcommunication from the UE communicated over a resource full duplexedwith one or more downlink communications associated with the second basestation based on monitoring the one or more resources for the CLI.

In some examples, the messaging manager 1225 may be configured as orotherwise support a means for transmitting a second message to activatea communication pattern of the one or more communication patterns, wheremonitoring the one or more resources for the CLI is based ontransmitting the second message.

In some examples, the message includes a radio resource control message.In some examples, the second message includes a medium accesscontrol-control element or downlink control information.

In some examples, the power manager 1235 may be configured as orotherwise support a means for identifying one or more UEs to mute theuplink communications during at least a portion of the one or moreresources, the one or more UEs including the first UE, wheretransmitting the message is based on identifying the one or more UEs.

In some examples, the power manager 1235 may be configured as orotherwise support a means for identifying one or more UEs to reduce atransmit power of the uplink communications during at least a portion ofthe one or more resources, the one or more UEs including the first UE,where transmitting the message is based on identifying the one or moreUEs.

In some examples, the frequency manager 1240 may be configured as orotherwise support a means for identifying one or more subbands offrequency resources or one or more slots of time resources or both forestimating the CLI channel, where the message includes an indication ofthe one or more subbands or the one or more slots.

In some examples, the one or more resources include one or more subbandsof frequency resources and one or more slots of time resources. In someexamples, the one or more communication patterns indicate to the UE tomute or reduce a transmit power of one or more uplink communicationsduring a set of time resources of the one or more resources.

In some examples, the frequency manager 1240 may be configured as orotherwise support a means for identifying a first subband of a BWP forestimating the CLI channel, a second subband of the BWP for an uplinkcommunication by the UE, and a third subband of the BWP as a guard bandbetween the first subband and the second subband, the one or moreresources including the BWP, where the one or more communicationpatterns included in the message indicate the first subband, the secondsubband, and the third subband. In some examples, monitoring the one ormore resources further includes monitoring the first subband of the BWPfor the CLI.

In some examples, the frequency manager 1240 may be configured as orotherwise support a means for receiving, over the second subband, theuplink communication from the UE based on transmitting the message.

In some examples, the hopping pattern manager 1245 may be configured asor otherwise support a means for identifying a hopping pattern ofsubbands of a BWP for estimating the CLI channel and receiving theuplink communications, the hopping pattern spanning a set of multipleslots, where the one or more communication patterns indicate the hoppingpattern.

In some examples, the hopping pattern indicates at least one timeresource for each subband of the subbands of the BWP for estimating theCLI channel.

In some examples, the TA manager 1250 may be configured as or otherwisesupport a means for identifying a TA for an uplink communicationcommunicated by the UE during the one or more resources, the TA based ona propagation delay of a downlink communication transmitted by thesecond base station. In some examples, the TA manager 1250 may beconfigured as or otherwise support a means for transmitting, to the UE,a second message that includes the TA, where the monitoring is based ontransmitting the second message. In some examples, the TA is based on acapability of the UE.

In some examples, the beam manager 1255 may be configured as orotherwise support a means for identifying one or more beams to restrictthe UE from using to transmit the uplink communications during the oneor more resources, where the message indicates the one or more beams.

In some examples, the one or more communication patterns indicate to theUE a set of beams that the UE is restricted from using for the uplinkcommunications.

In some examples, the interference manager 1230 may be configured as orotherwise support a means for identifying a first quantity of referencesignals transmitted by the second base station. In some examples, theinterference manager 1230 may be configured as or otherwise support ameans for identifying a second quantity of ports for estimating the CLIchannel based on identifying the first quantity of reference signals,where the one or more communication patterns are based on identifyingthe second quantity of ports. In some examples, the second base stationis configured to transmit downlink communications over the one or moreresources.

Additionally, or alternatively, the communications manager 1220 maysupport wireless communication at a first base station in accordancewith examples as disclosed herein. In some examples, the messagingmanager 1225 may be configured as or otherwise support a means fortransmitting a message indicating a first resource including a firsttype of resource or a second resource including a second type ofresource to use for estimating a CLI channel between the first basestation and a second base station, where the first base station isconfigured to receive uplink communications or transmit downlinkcommunications to a UE over the first type of resource and the firstbase station is configured to transmit the downlink communications tothe UE over the second type of resource. In some examples, theinterference manager 1230 may be configured as or otherwise support ameans for monitoring one or more resources for CLI associated with thesecond base station based on transmitting the message. In some examples,the interference manager 1230 may be configured as or otherwise supporta means for processing a first uplink communication from the UE over afull-duplex resource based on monitoring the one or more resources forthe CLI.

In some examples, the messaging manager 1225 may be configured as orotherwise support a means for transmitting, to the UE, a second messageto convert the first type of resource to the second type of resource,where monitoring the one or more resources for the CLI is based ontransmitting the message.

In some examples, the second message includes a slot format indicatorconfigured to convert the first resource including the first type ofresource to be the second type of resource.

In some examples, the first type of resource includes a flexible symbolconfigured to use with the uplink communications or the downlinkcommunications. In some examples, the second type of resource includes adownlink symbol.

FIG. 13 shows a diagram of a system 1300 including a device 1305 thatsupports signaling for inter-base station interference estimation inaccordance with aspects of the present disclosure. The device 1305 maybe an example of or include the components of a device 1005, a device1105, or a base station 105 as described herein. The device 1305 maycommunicate wirelessly with one or more base stations 105, UEs 115, orany combination thereof. The device 1305 may include components forbi-directional voice and data communications including components fortransmitting and receiving communications, such as a communicationsmanager 1320, a network communications manager 1310, a transceiver 1315,an antenna 1325, a memory 1330, code 1335, a processor 1340, and aninter-station communications manager 1345. These components may be inelectronic communication or otherwise coupled (e.g., operatively,communicatively, functionally, electronically, electrically) via one ormore buses (e.g., a bus 1350).

The network communications manager 1310 may manage communications with acore network 130 (e.g., via one or more wired backhaul links). Forexample, the network communications manager 1310 may manage the transferof data communications for client devices, such as one or more UEs 115.

In some cases, the device 1305 may include a single antenna 1325.However, in some other cases the device 1305 may have more than oneantenna 1325, which may be capable of concurrently transmitting orreceiving multiple wireless transmissions. The transceiver 1315 maycommunicate bi-directionally, via the one or more antennas 1325, wired,or wireless links as described herein. For example, the transceiver 1315may represent a wireless transceiver and may communicatebi-directionally with another wireless transceiver. The transceiver 1315may also include a modem to modulate the packets, to provide themodulated packets to one or more antennas 1325 for transmission, and todemodulate packets received from the one or more antennas 1325. Thetransceiver 1315, or the transceiver 1315 and one or more antennas 1325,may be an example of a transmitter 1015, a transmitter 1115, a receiver1010, a receiver 1110, or any combination thereof or component thereof,as described herein.

The memory 1330 may include RAM and ROM. The memory 1330 may storecomputer-readable, computer-executable code 1335 including instructionsthat, when executed by the processor 1340, cause the device 1305 toperform various functions described herein. The code 1335 may be storedin a non-transitory computer-readable medium such as system memory oranother type of memory. In some cases, the code 1335 may not be directlyexecutable by the processor 1340 but may cause a computer (e.g., whencompiled and executed) to perform functions described herein. In somecases, the memory 1330 may contain, among other things, a BIOS which maycontrol basic hardware or software operation such as the interactionwith peripheral components or devices.

The processor 1340 may include an intelligent hardware device (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1340 may be configured to operate a memoryarray using a memory controller. In some other cases, a memorycontroller may be integrated into the processor 1340. The processor 1340may be configured to execute computer-readable instructions stored in amemory (e.g., the memory 1330) to cause the device 1305 to performvarious functions (e.g., functions or tasks supporting signaling forinter-base station interference estimation). For example, the device1305 or a component of the device 1305 may include a processor 1340 andmemory 1330 coupled to the processor 1340, the processor 1340 and memory1330 configured to perform various functions described herein.

The inter-station communications manager 1345 may manage communicationswith other base stations 105, and may include a controller or schedulerfor controlling communications with UEs 115 in cooperation with otherbase stations 105. For example, the inter-station communications manager1345 may coordinate scheduling for transmissions to UEs 115 for variousinterference mitigation techniques such as beamforming or jointtransmission. In some examples, the inter-station communications manager1345 may provide an X2 interface within an LTE/LTE-A wirelesscommunications network technology to provide communication between basestations 105.

The communications manager 1320 may support wireless communication at afirst base station in accordance with examples as disclosed herein. Forexample, the communications manager 1320 may be configured as orotherwise support a means for transmitting, to a UE, a message thatindicates one or more communication patterns of one or more resourcesfor estimating a CLI channel between the first base station and a secondbase station, the first base station configured to receive uplinkcommunications over the one or more resources. The communicationsmanager 1320 may be configured as or otherwise support a means formonitoring the one or more resources for CLI associated with the secondbase station based on transmitting the message. The communicationsmanager 1320 may be configured as or otherwise support a means forprocessing a first uplink communication from the UE communicated over aresource full duplexed with one or more downlink communicationsassociated with the second base station based on monitoring the one ormore resources for the CLI.

Additionally, or alternatively, the communications manager 1320 maysupport wireless communication at a first base station in accordancewith examples as disclosed herein. For example, the communicationsmanager 1320 may be configured as or otherwise support a means fortransmitting a message indicating a first resource including a firsttype of resource or a second resource including a second type ofresource to use for estimating a CLI channel between the first basestation and a second base station, where the first base station isconfigured to receive uplink communications or transmit downlinkcommunications to a UE over the first type of resource and the firstbase station is configured to transmit the downlink communications tothe UE over the second type of resource. The communications manager 1320may be configured as or otherwise support a means for monitoring one ormore resources for CLI associated with the second base station based ontransmitting the message. The communications manager 1320 may beconfigured as or otherwise support a means for processing a first uplinkcommunication from the UE over a full-duplex resource based onmonitoring the one or more resources for the CLI.

By including or configuring the communications manager 1320 inaccordance with examples as described herein, the device 1305 maysupport techniques for more efficient utilization of communicationresources and improved user experience related to reduced interference.

In some examples, the communications manager 1320 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the transceiver 1315, the one ormore antennas 1325, or any combination thereof. Although thecommunications manager 1320 is illustrated as a separate component, insome examples, one or more functions described with reference to thecommunications manager 1320 may be supported by or performed by theprocessor 1340, the memory 1330, the code 1335, or any combinationthereof. For example, the code 1335 may include instructions executableby the processor 1340 to cause the device 1305 to perform variousaspects of signaling for inter-base station interference estimation asdescribed herein, or the processor 1340 and the memory 1330 may beotherwise configured to perform or support such operations.

FIG. 14 shows a flowchart illustrating a method 1400 that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure. The operations of the method1400 may be implemented by a UE or its components as described herein.For example, the operations of the method 1400 may be performed by a UE115 as described with reference to FIGS. 1 through 9 . In some examples,a UE may execute a set of instructions to control the functionalelements of the UE to perform the described functions. Additionally, oralternatively, the UE may perform aspects of the described functionsusing special-purpose hardware.

At 1405, the method may include receiving, from a first base station, amessage that indicates one or more communication patterns of one or moreresources for estimating a CLI channel between uplink communicationsassociated with the first base station and downlink communicationsassociated with a second base station. The operations of 1405 may beperformed in accordance with examples as disclosed herein. In someexamples, aspects of the operations of 1405 may be performed by amessaging manager 825 as described with reference to FIG. 8 .

At 1410, the method may include adjusting a transmission parameter foran uplink communication based on receiving the message from the firstbase station. The operations of 1410 may be performed in accordance withexamples as disclosed herein. In some examples, aspects of theoperations of 1410 may be performed by an interference manager 830 asdescribed with reference to FIG. 8 .

At 1415, the method may include transmitting the uplink communicationover the one or more resources based on adjusting the transmissionparameter. The operations of 1415 may be performed in accordance withexamples as disclosed herein. In some examples, aspects of theoperations of 1415 may be performed by an uplink manager 835 asdescribed with reference to FIG. 8 .

FIG. 15 shows a flowchart illustrating a method 1500 that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure. The operations of the method1500 may be implemented by a UE or its components as described herein.For example, the operations of the method 1500 may be performed by a UE115 as described with reference to FIGS. 1 through 9 . In some examples,a UE may execute a set of instructions to control the functionalelements of the UE to perform the described functions. Additionally, oralternatively, the UE may perform aspects of the described functionsusing special-purpose hardware.

At 1505, the method may include receiving, from a first base station, amessage that indicates one or more communication patterns of one or moreresources for estimating a CLI channel between uplink communicationsassociated with the first base station and downlink communicationsassociated with a second base station. The operations of 1505 may beperformed in accordance with examples as disclosed herein. In someexamples, aspects of the operations of 1505 may be performed by amessaging manager 825 as described with reference to FIG. 8 .

At 1510, the method may include receiving, from the first base station,a second message to activate a communication pattern of the one or morecommunication patterns. The operations of 1510 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1510 may be performed by a messaging manager 825 asdescribed with reference to FIG. 8 .

At 1515, the method may include adjusting a transmission parameter foran uplink communication based on receiving the message from the firstbase station and based on receiving the second message from the firstbase station. The operations of 1515 may be performed in accordance withexamples as disclosed herein. In some examples, aspects of theoperations of 1515 may be performed by an interference manager 830 asdescribed with reference to FIG. 8 .

At 1520, the method may include transmitting the uplink communicationover the one or more resources based on adjusting the transmissionparameter. The operations of 1520 may be performed in accordance withexamples as disclosed herein. In some examples, aspects of theoperations of 1520 may be performed by an uplink manager 835 asdescribed with reference to FIG. 8 .

FIG. 16 shows a flowchart illustrating a method 1600 that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure. The operations of the method1600 may be implemented by a base station or its components as describedherein. For example, the operations of the method 1600 may be performedby a base station 105 as described with reference to FIGS. 1 through 5and 10 through 13 . In some examples, a base station may execute a setof instructions to control the functional elements of the base stationto perform the described functions. Additionally, or alternatively, thebase station may perform aspects of the described functions usingspecial-purpose hardware.

At 1605, the method may include transmitting, to a UE, a message thatindicates one or more communication patterns of one or more resourcesfor estimating a CLI channel between the first base station and a secondbase station, the first base station configured to receive uplinkcommunications over the one or more resources. The operations of 1605may be performed in accordance with examples as disclosed herein. Insome examples, aspects of the operations of 1605 may be performed by amessaging manager 1225 as described with reference to FIG. 12 .

At 1610, the method may include monitoring the one or more resources forCLI associated with the second base station based on transmitting themessage. The operations of 1610 may be performed in accordance withexamples as disclosed herein. In some examples, aspects of theoperations of 1610 may be performed by an interference manager 1230 asdescribed with reference to FIG. 12 .

At 1615, the method may include processing a first uplink communicationfrom the UE communicated over a resource full duplexed with one or moredownlink communications associated with the second base station based onmonitoring the one or more resources for the CLI. The operations of 1615may be performed in accordance with examples as disclosed herein. Insome examples, aspects of the operations of 1615 may be performed by aninterference manager 1230 as described with reference to FIG. 12 .

FIG. 17 shows a flowchart illustrating a method 1700 that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure. The operations of the method1700 may be implemented by a base station or its components as describedherein. For example, the operations of the method 1700 may be performedby a base station 105 as described with reference to FIGS. 1 through 5and 10 through 13 . In some examples, a base station may execute a setof instructions to control the functional elements of the base stationto perform the described functions. Additionally, or alternatively, thebase station may perform aspects of the described functions usingspecial-purpose hardware.

At 1705, the method may include transmitting, to a UE, a message thatindicates one or more communication patterns of one or more resourcesfor estimating a CLI channel between the first base station and a secondbase station, the first base station configured to receive uplinkcommunications over the one or more resources. The operations of 1705may be performed in accordance with examples as disclosed herein. Insome examples, aspects of the operations of 1705 may be performed by amessaging manager 1225 as described with reference to FIG. 12 .

At 1710, the method may include transmitting a second message toactivate a communication pattern of the one or more communicationpatterns. The operations of 1710 may be performed in accordance withexamples as disclosed herein. In some examples, aspects of theoperations of 1710 may be performed by a messaging manager 1225 asdescribed with reference to FIG. 12 .

At 1715, the method may include monitoring the one or more resources forCLI associated with the second base station based on transmitting themessage and transmitting the second message. The operations of 1715 maybe performed in accordance with examples as disclosed herein. In someexamples, aspects of the operations of 1715 may be performed by aninterference manager 1230 as described with reference to FIG. 12 .

At 1720, the method may include processing a first uplink communicationfrom the UE communicated over a resource full duplexed with one or moredownlink communications associated with the second base station based onmonitoring the one or more resources for the CLI. The operations of 1720may be performed in accordance with examples as disclosed herein. Insome examples, aspects of the operations of 1720 may be performed by aninterference manager 1230 as described with reference to FIG. 12 .

FIG. 18 shows a flowchart illustrating a method 1800 that supportssignaling for inter-base station interference estimation in accordancewith aspects of the present disclosure. The operations of the method1800 may be implemented by a base station or its components as describedherein. For example, the operations of the method 1800 may be performedby a base station 105 as described with reference to FIGS. 1 through 5and 10 through 13 . In some examples, a base station may execute a setof instructions to control the functional elements of the base stationto perform the described functions. Additionally, or alternatively, thebase station may perform aspects of the described functions usingspecial-purpose hardware.

At 1805, the method may include transmitting a message indicating afirst resource including a first type of resource or a second resourceincluding a second type of resource to use for estimating a CLI channelbetween the first base station and a second base station, where thefirst base station is configured to receive uplink communications ortransmit downlink communications to a UE over the first type of resourceand the first base station is configured to transmit the downlinkcommunications to the UE over the second type of resource. Theoperations of 1805 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1805may be performed by a messaging manager 1225 as described with referenceto FIG. 12 .

At 1810, the method may include monitoring one or more resources for CLIassociated with the second base station based on transmitting themessage. The operations of 1810 may be performed in accordance withexamples as disclosed herein. In some examples, aspects of theoperations of 1810 may be performed by an interference manager 1230 asdescribed with reference to FIG. 12 .

At 1815, the method may include processing a first uplink communicationfrom the UE over a full-duplex resource based on monitoring the one ormore resources for the CLI. The operations of 1815 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1815 may be performed by an interference manager1230 as described with reference to FIG. 12 .

The following provides an overview of aspects of the present disclosure:

Aspect 1: A method for wireless communication at a UE, comprising:receiving, from a first base station, a message that indicates one ormore communication patterns of one or more resources for estimating aCLI channel between uplink communications associated with the first basestation and downlink communications associated with a second basestation; adjusting a transmission parameter for an uplink communicationbased at least in part on receiving the message from the first basestation; and transmitting the uplink communication over the one or moreresources based at least in part on adjusting the transmissionparameter.

Aspect 2: The method of aspect 1, further comprising: receiving, fromthe first base station, a second message to activate a communicationpattern of the one or more communication patterns, wherein adjusting atransmission parameter for the uplink communication is based at least inpart on receiving the second message.

Aspect 3: The method of aspect 2, wherein the message comprises a radioresource control message; and the second message comprises a mediumaccess control-control element or downlink control information.

Aspect 4: The method of any of aspects 1 through 3, wherein adjustingthe transmission parameter for the uplink communication furthercomprises: reducing the transmit power of the uplink communicationsduring at least a portion of the one or more resources.

Aspect 5: The method of aspect 4, wherein reducing the transmit power ofthe uplink communications further comprises: reducing the transmit powerof the uplink communications to zero during the portion of the one ormore resources.

Aspect 6: The method of any of aspects 1 through 5, further comprising:identifying a first subband of a BWP for estimating the CLI channel, asecond subband of the BWP for a second uplink communication by the UE,and a third subband of the BWP as a guard band between the first subbandand the second subband based at least in part on receiving the message,the one or more resources comprising the BWP, wherein the one or morecommunication patterns included in the message indicate the firstsubband, the second subband, and the third subband, wherein adjusting atransmission parameter for the uplink communication is based at least inpart on the identifying.

Aspect 7: The method of aspect 6, further comprising: transmitting, overthe second subband, the uplink communication to the first base stationbased at least in part on transmitting the message.

Aspect 8: The method of any of aspects 1 through 7, further comprising:identifying a hopping pattern of subbands of a BWP for estimating theCLI channel and transmitting the uplink communications based at least inpart on receiving the message, the hopping pattern spanning a pluralityof slots, wherein the one or more communication patterns indicate thehopping pattern, wherein adjusting a transmission parameter for theuplink communication is based at least in part on the identifying.

Aspect 9: The method of aspect 8, wherein the hopping pattern indicatesat least one time resource for each subband of the subbands of the BWPfor estimating the CLI channel.

Aspect 10: The method of any of aspects 1 through 9, wherein adjustingthe transmission parameter for the uplink communication furthercomprises: applying a TA for the uplink communication transmitted by theUE during a first time resource of the one or more resources based atleast in part on receiving the message, the TA based at least in part ona propagation delay of a downlink communication transmitted by thesecond base station.

Aspect 11: The method of aspect 10, wherein the TA is based at least inpart on a capability of the UE.

Aspect 12: The method of any of aspects 1 through 11, wherein adjustingthe transmission parameter for the uplink communication furthercomprises: identifying one or more beams to restrict the UE from usingto transmit the uplink communication during the one or more resources,wherein the message indicates the one or more beams.

Aspect 13: The method of aspect 12, further comprising: receiving, fromthe first base station, a second message that schedules the UE with theuplink communication using the one or more beams; and determining toskip the uplink communication or use a different beam than the one ormore beams based at least in part on the one or more communicationpatterns.

Aspect 14: The method of any of aspects 1 through 13, furthercomprising: identifying one or more subbands of frequency resources orone or more slots of time resources or both for estimating the CLIchannel, wherein the message includes an indication of the one or moresubbands or the one or more slots.

Aspect 15: The method of any of aspects 1 through 14, wherein the one ormore resources comprise one or more subbands of frequency resources andone or more slots of time resources.

Aspect 16: The method of any of aspects 1 through 15, wherein the one ormore communication patterns indicate to the UE to mute or reduce atransmit power of one or more uplink communications during a set of timeresources of the one or more resources.

Aspect 17: The method of any of aspects 1 through 16, wherein the one ormore communication patterns indicate a set of beams that the UE isrestricted from using for the uplink communications.

Aspect 18: The method of any of aspects 1 through 17, wherein the one ormore communication patterns indicate one or more ports for estimatingthe CLI channel.

Aspect 19: The method of any of aspects 1 through 18, wherein the firstbase station is configured to receive the uplink communications over theone or more resources; the second base station is configured to transmitthe downlink communications over the one or more resources.

Aspect 20: A method for wireless communication at a first base station,comprising: transmitting, to a UE, a message that indicates one or morecommunication patterns of one or more resources for estimating a CLIchannel between the first base station and a second base station, thefirst base station configured to receive uplink communications over theone or more resources; monitoring the one or more resources for CLIassociated with the second base station based at least in part ontransmitting the message; and processing a first uplink communicationfrom the UE communicated over a resource full duplexed with one or moredownlink communications associated with the second base station based atleast in part on monitoring the one or more resources for the CLI.

Aspect 21: The method of aspect 20, further comprising: transmitting asecond message to activate a communication pattern of the one or morecommunication patterns, wherein monitoring the one or more resources forthe CLI is based at least in part on transmitting the second message.

Aspect 22: The method of aspect 21, wherein the message comprises aradio resource control message; and the second message comprises amedium access control-control element or downlink control information.

Aspect 23: The method of any of aspects 20 through 22, furthercomprising: identifying one or more UEs to mute the uplinkcommunications during at least a portion of the one or more resources,the one or more UEs comprising the first UE, wherein transmitting themessage is based at least in part on identifying the one or more UEs.

Aspect 24: The method of any of aspects 20 through 23, furthercomprising: identifying one or more UEs to reduce a transmit power ofthe uplink communications during at least a portion of the one or moreresources, the one or more UEs comprising the first UE, whereintransmitting the message is based at least in part on identifying theone or more UEs.

Aspect 25: The method of any of aspects 20 through 24, furthercomprising: identifying one or more subbands of frequency resources orone or more slots of time resources or both for estimating the CLIchannel, wherein the message includes an indication of the one or moresubbands or the one or more slots.

Aspect 26: The method of any of aspects 20 through 25, wherein the oneor more resources comprise one or more subbands of frequency resourcesand one or more slots of time resources.

Aspect 27: The method of any of aspects 20 through 26, wherein the oneor more communication patterns indicate to the UE to mute or reduce atransmit power of one or more uplink communications during a set of timeresources of the one or more resources.

Aspect 28: The method of any of aspects 20 through 27, furthercomprising: identifying a first subband of a BWP for estimating the CLIchannel, a second subband of the BWP for an uplink communication by theUE, and a third subband of the BWP as a guard band between the firstsubband and the second subband, the one or more resources comprising theBWP, wherein the one or more communication patterns included in themessage indicate the first subband, the second subband, and the thirdsubband.

Aspect 29: The method of aspect 28, wherein monitoring the one or moreresources further comprises monitoring the first subband of the BWP forthe CLI.

Aspect 30: The method of any of aspects 28 through 29, furthercomprising: receiving, over the second subband, the uplink communicationfrom the UE based at least in part on transmitting the message.

Aspect 31: The method of any of aspects 20 through 30, furthercomprising: identifying a hopping pattern of subbands of a BWP forestimating the CLI channel and receiving the uplink communications, thehopping pattern spanning a plurality of slots, wherein the one or morecommunication patterns indicate the hopping pattern.

Aspect 32: The method of aspect 31, wherein the hopping patternindicates at least one time resource for each subband of the subbands ofthe BWP for estimating the CLI channel.

Aspect 33: The method of any of aspects 20 through 32, furthercomprising: identifying a TA for an uplink communication communicated bythe UE during the one or more resources, the TA based at least in parton a propagation delay of a downlink communication transmitted by thesecond base station; and transmitting, to the UE, a second message thatcomprises the TA, wherein the monitoring is based at least in part ontransmitting the second message.

Aspect 34: The method of aspect 33, wherein the TA is based at least inpart on a capability of the UE.

Aspect 35: The method of any of aspects 20 through 34, furthercomprising: identifying one or more beams to restrict the UE from usingto transmit the uplink communications during the one or more resources,wherein the message indicates the one or more beams.

Aspect 36: The method of any of aspects 20 through 35, wherein the oneor more communication patterns indicate to the UE a set of beams thatthe UE is restricted from using for the uplink communications.

Aspect 37: The method of any of aspects 20 through 36, furthercomprising: identifying a first quantity of reference signalstransmitted by the second base station; and identifying a secondquantity of ports for estimating the CLI channel based at least in parton identifying the first quantity of reference signals, wherein the oneor more communication patterns are based at least in part on identifyingthe second quantity of ports.

Aspect 38: The method of any of aspects 20 through 37, wherein thesecond base station is configured to transmit downlink communicationsover the one or more resources.

Aspect 39: A method for wireless communication at a first base station,comprising: transmitting a message indicating a first resourcecomprising a first type of resource or a second resource comprising asecond type of resource to use for estimating a CLI channel between thefirst base station and a second base station, wherein the first basestation is configured to receive uplink communications or transmitdownlink communications to a UE over the first type of resource and thefirst base station is configured to transmit the downlink communicationsto the UE over the second type of resource; monitoring one or moreresources for CLI associated with the second base station based at leastin part on transmitting the message; and processing a first uplinkcommunication from the UE over a full-duplex resource based at least inpart on monitoring the one or more resources for the CLI.

Aspect 40: The method of aspect 39, further comprising: transmitting, tothe UE, a second message to convert the first type of resource to thesecond type of resource, wherein monitoring the one or more resourcesfor the CLI is based at least in part on transmitting the message.

Aspect 41: The method of aspect 40, wherein the second message comprisesa slot format indicator configured to convert the first resourcecomprising the first type of resource to be the second type of resource.

Aspect 42: The method of any of aspects 39 through 41, wherein the firsttype of resource comprises a flexible symbol configured to use with theuplink communications or the downlink communications; and the secondtype of resource comprises a downlink symbol.

Aspect 43: An apparatus for wireless communication at a UE, comprising amemory; and a processor coupled to the memory and configured to causethe apparatus to perform a method of any of aspects 1 through 19.

Aspect 44: An apparatus for wireless communication at a UE, comprisingat least one means for performing a method of any of aspects 1 through19.

Aspect 45: A non-transitory computer-readable medium storing code forwireless communication at a UE, the code comprising instructionsexecutable by a processor to perform a method of any of aspects 1through 19.

Aspect 46: An apparatus for wireless communication at a first basestation, comprising a memory; and a processor coupled to the memory andconfigured to cause the apparatus to perform a method of any of aspects20 through 38.

Aspect 47: An apparatus for wireless communication at a first basestation, comprising at least one means for performing a method of any ofaspects 20 through 38.

Aspect 48: A non-transitory computer-readable medium storing code forwireless communication at a first base station, the code comprisinginstructions executable by a processor to perform a method of any ofaspects 20 through 38.

Aspect 49: An apparatus for wireless communication at a first basestation, comprising a memory; and a processor coupled to the memory andconfigured to cause the apparatus to cause the apparatus to perform amethod of any of aspects 39 through 42.

Aspect 50: An apparatus for wireless communication at a first basestation, comprising at least one means for performing a method of any ofaspects 39 through 42.

Aspect 51: A non-transitory computer-readable medium storing code forwireless communication at a first base station, the code comprisinginstructions executable by a processor to perform a method of any ofaspects 39 through 42.

It should be noted that the methods described herein describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may bedescribed for purposes of example, and LTE, LTE-A, LTE-A Pro, or NRterminology may be used in much of the description, the techniquesdescribed herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NRnetworks. For example, the described techniques may be applicable tovarious other wireless communications systems such as Ultra MobileBroadband (UMB), Institute of Electrical and Electronics Engineers(IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, aswell as other systems and radio technologies not explicitly mentionedherein.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the description may be represented byvoltages, currents, electromagnetic waves, magnetic fields or particles,optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connectionwith the disclosure herein may be implemented or performed with ageneral-purpose processor, a DSP, an ASIC, a CPU, an FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described herein. A general-purpose processor may be amicroprocessor, but in the alternative, the processor may be anyprocessor, controller, microcontroller, or state machine. A processormay also be implemented as a combination of computing devices (e.g., acombination of a DSP and a microprocessor, multiple microprocessors, oneor more microprocessors in conjunction with a DSP core, or any othersuch configuration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described herein may be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that may beaccessed by a general-purpose or special-purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude RAM, ROM, electrically erasable programmable ROM (EEPROM), flashmemory, compact disk (CD) ROM or other optical disk storage, magneticdisk storage or other magnetic storage devices, or any othernon-transitory medium that may be used to carry or store desired programcode means in the form of instructions or data structures and that maybe accessed by a general-purpose or special-purpose computer, or ageneral-purpose or special-purpose processor. Also, any connection isproperly termed a computer-readable medium. For example, if the softwareis transmitted from a website, server, or other remote source using acoaxial cable, fiber optic cable, twisted pair, digital subscriber line(DSL), or wireless technologies such as infrared, radio, and microwave,then the coaxial cable, fiber optic cable, twisted pair, DSL, orwireless technologies such as infrared, radio, and microwave areincluded in the definition of computer-readable medium. Disk and disc,as used herein, include CD, laser disc, optical disc, digital versatiledisc (DVD), floppy disk and Blu-ray disc where disks usually reproducedata magnetically, while discs reproduce data optically with lasers.Combinations of the above are also included within the scope ofcomputer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (i.e., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an example step that is described as “based on condition A”may be based on both a condition A and a condition B without departingfrom the scope of the present disclosure. In other words, as usedherein, the phrase “based on” shall be construed in the same manner asthe phrase “based at least in part on.”

The term “determine” or “determining” encompasses a wide variety ofactions and, therefore, “determining” can include calculating,computing, processing, deriving, investigating, looking up (such as vialooking up in a table, a database or another data structure),ascertaining and the like. Also, “determining” can include receiving(such as receiving information), accessing (such as accessing data in amemory) and the like. Also, “determining” can include resolving,selecting, choosing, establishing and other such similar actions.

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “example” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, known structures and devices are shown inblock diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person having ordinaryskill in the art to make or use the disclosure. Various modifications tothe disclosure will be apparent to a person having ordinary skill in theart, and the generic principles defined herein may be applied to othervariations without departing from the scope of the disclosure. Thus, thedisclosure is not limited to the examples and designs described hereinbut is to be accorded the broadest scope consistent with the principlesand novel features disclosed herein.

What is claimed is:
 1. An apparatus for wireless communication at a userequipment (UE), comprising: a memory; and a processor coupled to thememory and configured to cause the apparatus to: receive, from a firstbase station, a message that indicates one or more communicationpatterns of one or more resources for estimating a cross-linkinterference channel between uplink communications associated with thefirst base station and downlink communications associated with a secondbase station; adjust a transmission parameter for an uplinkcommunication based at least in part on receiving the message from thefirst base station; and transmit the uplink communication over the oneor more resources based at least in part on adjusting the transmissionparameter.
 2. The apparatus of claim 1, wherein the processor is furtherconfigured to cause the apparatus to: receive, from the first basestation, a second message to activate a communication pattern of the oneor more communication patterns, wherein adjusting the transmissionparameter for the uplink communication is based at least in part onreceiving the second message.
 3. The apparatus of claim 2, wherein: themessage comprises a radio resource control message; and the secondmessage comprises a medium access control-control element or downlinkcontrol information.
 4. The apparatus of claim 1, wherein the processorconfigured to adjust the transmission parameter for the uplinkcommunication is further configured to cause the apparatus to: reduce atransmit power of the uplink communications during at least a portion ofthe one or more resources.
 5. The apparatus of claim 4, wherein theprocessor configured to reduce the transmit power of the uplinkcommunications is further configured to cause the apparatus to: reducethe transmit power of the uplink communications to zero during theportion of the one or more resources.
 6. The apparatus of claim 1,wherein the processor is further configured to cause the apparatus to:identify a first subband of a bandwidth part for estimating thecross-link interference channel, a second subband of the bandwidth partfor a second uplink communication by the UE, and a third subband of thebandwidth part as a guard band between the first subband and the secondsubband based at least in part on receiving the message, the one or moreresources comprising the bandwidth part, wherein the one or morecommunication patterns included in the message indicate the firstsubband, the second subband, and the third subband, wherein adjustingthe transmission parameter for the uplink communication is based atleast in part on the identifying.
 7. The apparatus of claim 6, whereinthe processor is further configured to cause the apparatus to: transmit,over the second subband, the uplink communication to the first basestation based at least in part on receiving the message.
 8. Theapparatus of claim 1, wherein the processor is further configured tocause the apparatus to: identify a hopping pattern of subbands of abandwidth part for estimating the cross-link interference channel andtransmitting the uplink communications based at least in part onreceiving the message, the hopping pattern spanning a plurality ofslots, wherein the one or more communication patterns indicate thehopping pattern, wherein adjusting the transmission parameter for theuplink communication is based at least in part on the identifying. 9.The apparatus of claim 8, wherein the hopping pattern indicates at leastone time resource for each subband of the subbands of the bandwidth partfor estimating the cross-link interference channel.
 10. The apparatus ofclaim 1, wherein the processor configured to adjust the transmissionparameter for the uplink communication is further configured to causethe apparatus to: apply a timing advance for the uplink communicationtransmitted by the UE during a first time resource of the one or moreresources based at least in part on receiving the message, the timingadvance based at least in part on a propagation delay of a downlinkcommunication transmitted by the second base station.
 11. The apparatusof claim 1, wherein the processor configured to adjust the transmissionparameter for the uplink communication is further configured to causethe apparatus to: identify one or more beams to restrict the UE fromusing to transmit the uplink communication during the one or moreresources, wherein the message indicates the one or more beams.
 12. Theapparatus of claim 11, wherein the processor is further configured tocause the apparatus to: receive, from the first base station, a secondmessage that schedules the UE with the uplink communication using theone or more beams; and determine to skip the uplink communication or usea different beam than the one or more beams based at least in part onthe one or more communication patterns.
 13. The apparatus of claim 1,wherein the processor is further configured to cause the apparatus to:identify one or more subbands of frequency resources or one or moreslots of time resources or both for estimating the cross-linkinterference channel, wherein the message includes an indication of theone or more subbands or the one or more slots.
 14. The apparatus ofclaim 1, wherein: the one or more resources comprise one or moresubbands of frequency resources and one or more slots of time resources;and the one or more communication patterns indicate to the UE to mute orreduce a transmit power of one or more uplink communications during aset of time resources of the one or more resources.
 15. The apparatus ofclaim 1, wherein the one or more communication patterns indicate one ormore ports for estimating the cross-link interference channel.
 16. Theapparatus of claim 1, wherein: the first base station is configured toreceive the uplink communications over the one or more resources; andthe second base station is configured to transmit the downlinkcommunications over the one or more resources.
 17. An apparatus forwireless communication at a first base station, comprising: a memory;and a processor coupled to the memory and configured to cause theapparatus to: transmit, to a user equipment (UE), a message thatindicates one or more communication patterns of one or more resourcesfor estimating a cross-link interference channel between the first basestation and a second base station, the first base station configured toreceive uplink communications over the one or more resources; monitorthe one or more resources for cross-link interference associated withthe second base station based at least in part on transmitting themessage; and process an uplink communication from the UE communicatedover a resource full duplexed with one or more downlink communicationsassociated with the second base station based at least in part onmonitoring the one or more resources for the cross-link interference.18. The apparatus of claim 17, wherein the processor is furtherconfigured to cause the apparatus to: transmit a second message toactivate a communication pattern of the one or more communicationpatterns, wherein monitoring the one or more resources for thecross-link interference is based at least in part on transmitting thesecond message, wherein the message comprises a radio resource controlmessage and the second message comprises a medium access control-controlelement or downlink control information.
 19. The apparatus of claim 17,wherein the processor is further configured to cause the apparatus to:identify one or more UEs to mute the uplink communications during atleast a portion of the one or more resources, the one or more UEscomprising the UE, wherein transmitting the message is based at least inpart on identifying the one or more UEs.
 20. The apparatus of claim 17,wherein the processor is further configured to cause the apparatus to:identify one or more subbands of frequency resources or one or moreslots of time resources or both for estimating the cross-linkinterference channel, wherein the message includes an indication of theone or more subbands or the one or more slots.
 21. The apparatus ofclaim 17, wherein the processor is further configured to cause theapparatus to: identify a first subband of a bandwidth part forestimating the cross-link interference channel, a second subband of thebandwidth part for the uplink communication by the UE, and a thirdsubband of the bandwidth part as a guard band between the first subbandand the second subband, the one or more resources comprising thebandwidth part, wherein the one or more communication patterns includedin the message indicate the first subband, the second subband, and thethird subband.
 22. The apparatus of claim 21, wherein the processorconfigured to monitor the one or more resources further comprises theprocessor configured to cause the apparatus to monitor the first subbandof the bandwidth part for the cross-link interference.
 23. The apparatusof claim 21, wherein the processor is further configured to cause theapparatus to: receive, over the second subband, the uplink communicationfrom the UE based at least in part on transmitting the message.
 24. Theapparatus of claim 17, wherein the processor is further configured tocause the apparatus to: identify a hopping pattern of subbands of abandwidth part for estimating the cross-link interference channel andreceiving the uplink communications, the hopping pattern spanning aplurality of slots, wherein the one or more communication patternsindicate the hopping pattern, wherein the hopping pattern indicates atleast one time resource for each subband of the subbands of thebandwidth part for estimating the cross-link interference channel. 25.The apparatus of claim 17, wherein the processor is further configuredto cause the apparatus to: identify a timing advance for the uplinkcommunication communicated by the UE during the one or more resources,the timing advance based at least in part on a propagation delay of adownlink communication transmitted by the second base station; andtransmit, to the UE, a second message that comprises the timing advance,wherein the monitoring is based at least in part on transmitting thesecond message, wherein the timing advance is based at least in part ona capability of the UE.
 26. The apparatus of claim 17, wherein theprocessor is further configured to cause the apparatus to: identify oneor more beams to restrict the UE from using to transmit the uplinkcommunications during the one or more resources, wherein the messageindicates the one or more beams.
 27. An apparatus for wirelesscommunication at a first base station, comprising: a memory; and aprocessor coupled to the memory and configured to cause the apparatusto: transmit a message indicating a first resource comprising a firsttype of resource or a second resource comprising a second type ofresource to use for estimating a cross-link interference channel betweenthe first base station and a second base station, wherein the first basestation is configured to receive uplink communications or transmitdownlink communications to a user equipment (UE) over the first type ofresource and the first base station is configured to transmit thedownlink communications to the UE over the second type of resource;monitor one or more resources for cross-link interference associatedwith the second base station based at least in part on transmitting themessage; and process an uplink communication from the UE over afull-duplex resource based at least in part on monitoring the one ormore resources for the cross-link interference.
 28. The apparatus ofclaim 27, wherein the processor is further configured to cause theapparatus to: transmit, to the UE, a second message to convert the firsttype of resource to the second type of resource, wherein monitoring theone or more resources for the cross-link interference is based at leastin part on transmitting the message, wherein the second messagecomprises a slot format indicator configured to convert the firstresource comprising the first type of resource to be the second type ofresource.
 29. The apparatus of claim 27, wherein: the first type ofresource comprises a flexible symbol configured to use with the uplinkcommunications or the downlink communications; and the second type ofresource comprises a downlink symbol.
 30. A method for wirelesscommunication at a user equipment (UE), comprising: receiving, from afirst base station, a message that indicates one or more communicationpatterns of one or more resources for estimating a cross-linkinterference channel between uplink communications associated with thefirst base station and downlink communications associated with a secondbase station; adjusting a transmission parameter for an uplinkcommunication based at least in part on receiving the message from thefirst base station; and transmitting the uplink communication over theone or more resources based at least in part on adjusting thetransmission parameter.